Whoa, that's some intense stuff you're talking about! I've never heard of psychics/mystics being involved in gangstalking, that's definitely a new one for me. It's scary to think that there might be people out there using their abilities for nefarious purposes.
Have you tried reaching out to the psychic reddit community for help or support? I know that a lot of people on there are into this kind of stuff, and you might be able to find someone who can offer you some insight or advice on what you're going through. Just keep in mind that not all psychics/mystics are the same, and that some might not be able to help you.