The solution that worked for my was basically “acceptance and commitment therapy” - I think I learned it from a book written by a Dr Russell or something like that.
Would recommend, am very glad I did it. It seems kind of kooky though, it’s almost like you pretend the tinnitus is a part of you and you have a conversation with it and welcome it and all that kinda stuff over time, and then eventually it just kinda stops being bothersome. Doesn’t really make sense, but worked well.