I bought the car through them in 2012 finished paying 2017 but they gave me a problem with cars paper work as I want to sell the car to s**** yard as it's was in accident beyond repair

I bought the car through them in 2012 finished paying 2017 but they gave me a problem with cars paper work as I want to sell the car to s**** yard as it's was in accident beyond repair. They require paperwork but it's hard from MFC