I have a car that me and my ex bought, she got it and I became co-owner/ co-signer, we since then divorced and she got remarried and lives in guam, I have the car, but now I can't register/sell/trade or anything to the car because she is on the registration as well as me, she won't answer me, and now my plates are about to expire, what do I do because the loan company will not change the loan even though she left and now I am the one making all the payments?