Prestige Financial Ripoff dont use this company. Salt Lake City Utah

In 2002 I purchased a vehicle and the financing was through this company. The contract was for 72 payments, I have now made 69 payments, but they say I owe $8000.00, how can that be. They say that it is fees and interest, my payment was only 552.56 per month. I want to know if anyone has ever been successfull with this company. I gave them an alternative to us filing bankruptcy ( just to get out from under all these fees) I said that we could go and buy another vechile with a large rebate, then this vehicle could be paid off and we would finance the other vehicle with them at a lower interest rate. They refused. The car is probably worth $1500.00, why would I continue to pay them another $8000.00 for this vehicle. Any suggestions on how to deal with this before I go and file bankruptcy would be appreciated.

Ripped off in new mexico
Rio Rancho, New Mexico
U.S.A.