You were complaining about the color not matching correctly, correct?
The chances of you getting the correct tint, shade, paint lay from another car, IMO, is just as great as if you had the rockers painted at the shop.
You should NOT have accepted the car.<PERIOD
By accepting the car as is, you agreed to accept delivery of car, with apparent flaws, as-is.
SH(T happens. I don't know about you, but you, me, them, GM, and Oshawa is not perfect. Yes, I agree, your check was not damaged or repaired, but again, I say, you accepted the car...your responsibility.
I go to store, grab a bag of chips, open them up, eat a handful and realize they are not the sour cream and cheddar I wanted or thought I grabbed, You think the store is going to give me a refund?
Suck it up and quit bad mouthing GM. GM is your scapegoat for your obvious lack of inspection of your $38,000 Camaro.