I know someone else who is victimised by a remote controller kind of guy. This guy takes over his body and forces him to do stuff. He, too, has some terrible problems trying to get rid of him.
I don't know what I can advise, except that logically, I would assume that if there are people with such great powers to do ill, there must be people with similar powers to do good - who can help you. I think I would suggest you talk to rei, as she seems like the most powerful healer / do gooder I know. If anyone I know could help you, I think it'd be her.
You can find her on the forum and also peruse her services at Intuitive Readings, Spiritual Healing, Transpersonal Coaching for Truth and Love: Rei Williams