Go and lie to them that you are a Satanist no more and you converted back to your previous religion so that they will leave you alone.
I hope you realized your mistake. It's been said that you should never tell others that you are a Satanist and if you live with your parents you shouldn't keep anything Satanism-related in your room, but do all rituals and practices mentally in your astral temple. Also use the incognito mode in your browser when browsing the JoS and other Satanic material and clear all your browser's history if you forgot to do so.