Most dealers around here outsource body work and I wouldn't trust the ones that don't. Maybe different in cheeseland.
When you talk to the manager make sure you make your case that the issue is clear - the car was not scratched prior and was after. Also, it's brand new.
However, about all you can ask for is a refund and outside body detailing paid for to be done at another firm. That should hopefully buff out the scratches. If they are too deep than a re-paint (by the Dealer only) should be necessary.
Car washes have liability insurance. There's a reason.