Hhmm?... Where to start.... I really dnt understand what one would mean by leaving Satan... Most especially after the dedication of the soul. Is it where you denounce him en go back to church... Or stop beliving in him and his demons.. Idk really... But I wouldn't consider that as leaving him... I mean, you may think you have left him by doing things contrary to his path... But... There is just no way. First and foremost, I mean from what I have learned, a dedication of the soul to Satan is eternal. It's forever and for ever always. There's just nothing one can do anger father Satan to denouncing him/her, or "leaving the person" as most usually call it. That would really be extreme... And I dnt imagine father to be that... petty. Lol Now, secondly...
I dedicated my soul to father Satan at the age of 18, and now am 21.
The main point here is the 18yrs of indoctrination. Raised as a muslim in an African country, there rr just no words to truly sample the spiritual slavery and degeneration that I underwent. And also being a girl.
I was programmed to hate, fear and blame father Satan for every unfortunate thing in this world. FOR 18yrs. And I have only had 3-4yrs to re-program my mind. At this point I know a lot, and I know wayyyy batter.
But back then, at the Genesis of my spiritual journey I did not, I was scared and I was alone. Just the idea that Allah is not really God but Shaitan is God baffled me.
So here is were I get to tell you that I fell off the wagon now and then, I ran back to Allah now and then, I cried from the truth now and then, and I denounced Satan from fear and ran back to the mosque now and then. Hehe, it's actually funny thinking about it now.
But really I dnt see why Satan would "leave me" just because I was in a state of kwagme...confusion.
And he never left me, not once, I felt his presence and guidance even when I cursed him thinking he was trying to corrupt me. The main point here is that father is wayyyy too big for that... His understanding and love is wayyyy beyond that. I BELIEVE THERE IS NOT A SINGLE THING ONE CAN DO FOR SATAN TO DESERT OR DENOUNCE HIM/HER. NOTHING. However as for angering him... There is not much really, but a few... At least those i know in regards to what he has made known to me. Satan hates ignorant souls that chose to remain ignorant. He hates those who rr taught but refuse to learn. He REALLY hates weakness combined with laziness. He is really big on that one. And rr...I can't think of anything else as of now. NB
Satan can't- will not leave anyone... However, imagine he would be somewhat indifferent to those who constantly prove unworthy of his attention. And he can punish those who mock him. And why not... He is God. Like said in the Aljilwah that he gives and takes away, and bless those who honour and rr under his image. But that punishing is here on earth, not some spiritual purgatory that is brimming with wild fire.. As For leaving him on "accident"... hihi, that's funny.
Sorry. I love to laugh. (I mean, you gotta make serious mistakes if he leaves you)? Like what? If so, does he still take their souls to hell? The souls that have left him, but did the dedication? Now that one is a little bit tricky for me... In regards to the matters of the afterlife. I still need to get my facts ryt... But I will throw some light on that which I know for sure. According to your entire post I fathom you speak of hell in some sort of xtian context. Idk. My English is not all that good. Am not going to talk about hell, but am going to tell you what happens to a soul after death. I read some abt the fourth dimension. Which is the Astral. And it's here...on earth, Or everywhere...
It's the dimension where spirit 's exist. Quote-not demons- but spirits.
However demons just use the Astral to communicate with us...I think... Leaving demons alone... My main point is, once a human being dies the soul goes to the Astral...it is like the spiritual space, that one can not see if they rr not advanced.
But it's all around us. Wen the soul leaves the body_most likely_ NOTHING HAPPENS.
More specifically for those who rr not dedicated, xtian or not.
Nothing happens. The soul is trapped in an inert state, left to wonder the Astral purposeless, roaming for a somewhile, until father Satan reincarnates such a Soul once again. YES. Satan does reincarnate undedicated souls. Yet for those who rr dedicated, they rr protected, they rr welcomed into the Astral and guided to a safe... Place... By demons of Satan.
And am not yet sure if that place is hell. But I once read in a sermon where where Maxine visited hell... And that she saw souls that were waiting for reincarnation.... Now I imagine obviously they had to be dedicated souls. Um mm huh...
Now speaking of protection. Hmmm? The Astral is not entirely safe I imagine, roaming with all sorts of spirits, and not just souls of the deceased. So obviously there's need of protection from that which you may know nothing of. And among those, rr the angels on the Astral. Yes. That dirty fifth could very likely come around too when a person dies.
But these usually come to very very staunch xtian. Because these rr reeking with negative energy that they so very much love to feed on. So since the soul it's self is a form of energy they can devour it completely and one can cease to exist totally and for ever. There's nothing left for Satan to reincarnate. NOTHING? My brother, or sister that Is why I always recommend a dedication. That's my personal understanding of what I have read from the joS. and a few which I have mediated on to understand. I hope it helps your cause in one way or another, but I really recommend that you do research of your own. I apologize for where I have not made sense, English is no my first language, so I write the way I speak.

Hail father Satan
Hail all hell Devil'sAdvocate nic
Dark blessings
Can someone leave him on accident? Like make a stupid choice but still want to be with him after? If so, does he still take their souls to hell? The souls that have left him, but did the dedication? Or people that he leaves because of whatever reason, but did the dedication/are dedicted despite him leaving them (I mean, you gotta make serious mistakes if he leaves you)? Do they go to hell too? Or does he just leave their soul to be ripped apart by the enemy after death?