...bought a 2002 chevy cavalier? The problem is the car is worth 4-5K and she was charged 10000 dollars is ther any way to go after the dealer or the bank for taking advantage of her?
Legally, she can get out of that contract because she is not sane. Any contract she signs is not valid because she is mentally ill. Get a lawyer if the dealer and/or bank don't want to take back the vehicle.
