You've got a couple of options here: you could go back to the dealer with a copy of your repair order and ask to speak to the service manager to see if he will give you some of your money back. If you don't get anywhere with him, ask to speak to the general manager. You probably won't get all of your money back, but maybe they'll refund some of it. Be nice, but firm. And next time, be careful what you ask for when you get service.