I've tried becoming Christian but the religion didn't fit me, I don't believe it's scriptures for what they say translated and I dislike the writing style and the requirement about obeying oppressive governments in Corinthians or romans where it says obey the governor not just to avoid punishment for conscious sake. I can see obeying to keep the peace or to obey a rule but I don't think it's actually good morally to obey governments since they make extra unfair rules. Like no weed. I also don't believe in eternal fire.The whole book seems like authority worship to me, and I don't believe in eternal fire or anyone needs saving from eternal fire because God would never burn something permanently anyways. When I belived Jesus was real I tried casting the demon out in Jesus name and praying to God thousands of times total. I saw around 10 people who tried to cast it out too or rebuke it.I've tried praying to God.I've tried begging God.The spirit is so persistant i've considered it is an angel punishing me.The only thing I havent tried is magick. I don't know how to do magick and don't have a teacher.
Confront the demon and command it to tell you it's name and what it wants of you. If it wants something reasonable, then assent. If not, then defy it and ignore it. Do something positive and good. Continue to do that until you have no strength, then seek rest. Meditate and pray to any gods through hold sacred. I prefer Athena, Apollo, and Loki. My main god is Aristotle's god from his Metaphysics.Good luck.