Thomas, the way I do my math, your payment was $471.85 per month, and a 72 month loan being 6 years from 2/2/05 would be 2/2/2011, meaning the first payment was probably in March 2005, which means your last payment would be in March 2011. That would be 2 more payments.
Do you have records of your payments? Bank statements, cancelled checks, money order reciepts, etc? You will certainly need them with Santander.
Did you ever run into financial problems and "skip" payments?
Were all payments made on time?
If so, file complaints in writing to the lender and to all appropriate government agencies and consumer protection organizations.
For Jim, He may not understand financing, but his math is correct on this one.