Four years ago I bought a 2-month-old pre-registered Mazda 3 with seven miles on the clock from a main dealer. Obviously, it had never been driven much. I paid for the car and have the receipt. Still, after many requests to have it changed, the Mazda service documentation shows the owner as the company to whom the car was first registered. I want to sell the car and don't want to have to explain all this to any prospective buyer because the first registered keeper is a car hire firm. Apart from camping outside Mazda's HQ is there anything else I can do?