dedalos,
It's probably a true story. It happens every once in a while that a car dealership (or more than one) near a military base starts making questionable loans with the objective of screwing young military members out of a lot of money. It's sort of like the bad mortgage loans, but with cars. The loan officers at the dealership know that the kid has a "secure" salary and a boss who will make the kid stay on base in the dorms if that is what is necessary to pay the loan, so they make loans that would not normally be extended to people with normal jobs. The dealer wins because he moves cars, the loan guy wins because he sold a loan, toyota wins because again they sold the car, toyota financial wins because "big money" loans to banks and other financial institutions are nearly 0% now, and a kid buying a new car on a military salary is going to end up paying a few percent interest even though the lender is getting the money essentially free. If and when the loan defaults, either through inability to pay or in this case, the lender playing games, the car is repossessed and the kid gets screwed. Guess what - the lender still makes a profit on the interest paid to that point, and the dealer gets back a lightly used car since many (most?) servicemembers take good care of their cars, and they're often very low mileage too.
It's basically a huge scam targeting military members, and several car dealerships near Sheppard AFB have at various times been blacklisted for these kinds of predatory loans.
My suggestion is to write both your federal and state congressmen. The state might be able to adjust state law to address the problem, and the fed congressman may have suggestions on various federal statutes that have been aimed at preventing this sort of thing. For example, if you were deployed or TDY when the car was repossessed, the lender would be in violation of federal law aimed at keeping this from happening.
I do suggest that you first tell your commander, and ask permission to include your commander's name and contact information so the congressman can verify your story. Don't want to blindside your boss with a congressional investigation...