Toyota has withheld my cars papers even when I have paid it in full, and an additional fee has already been paid.

Your end-user system is flawed as well as your communication skills. Please fix it so people can get the papers to their cars once they've completed the purchase by paying you. When you offer a service as a business, please be courteous enough to streamline information between your clients and your call centre. Solve the problem timeously in order to avoid lack of skills being publicized. This is a beacon for *****ulent activity if a person is not careful.