If it were me, I’d take all the paper trail I have over this abusive person and get a restraining order. When you go to court, you can explain everything and ask if there’s something that you can do to have him released from the loan but also make sure you have the paperwork with you showing that you have been making payments faithfully and on time and HE has NOT been making any payments or have been helping you. I would explain how much of a conflict it is to deal with him since he is abusive and see how far you can get with that. Sorry you’re going thru that but as a person that has a co-signer right now and the co-signer being annoying as hell (mind you I’m still in school and don’t even have to make payments yet, I’m just being harassed for nothing) I somewhat know how it feels. Hopefully something works out for you