Maybe instead of writing to the CEO and all the top level managers, if he had spoken to the local garage who actually know how to fix the car it might have been repaired?
Personally I hope the dealerships around there blackmark him as not worth selling to as he's a liability.
"You wish to arrange an appointment? Sure, your name please? Mr Han? I'm sorry but we seem to be fully booked until the end of the world. Goodbye."