Sometimes, break noise are just impposible to get rid of. If you tried everything and its still there, invest in an audio system.

About the dealership, I hope you didn't get the manager mad because they might do something else to your car are something. I dont get why you need new rotors tho, because you have resurfaced them and everything, as long as the rotor width is still legal limit, it should be like brand new, just a tad skinnier.

Theres a small chance that maybe they did not put the thin metal "anti-squeak" plate before they put the pads back on, it could also help to try Caliper Lube, or the Brake Quiet.

Once you are sure that it is there problem, and that It was never there before you took it to them, I would probably write letters (although this may take forever for them to respond to), talk to managers and supervisors, and call them constantly. $283 will not break their wallets, but when you keep talkin to them and calling them, they will probably lose more money than $283 because they are talking to you instead of doing something else.

BTW: I really do not think you should pay for what they have done.