@doc house, that’s pretty shocking for a dealer to inflict that amount of damage. Maybe returning your car dirty was a blessing in disguise though; think of the additional damage they’d be likely to do to the paintwork (swirls and scratches) with the grit-laden dirty sponge and dirty water their yts trainee would’ve used to ‘clean’ it! Hopefully the dirty state it’s in isn’t the result of the complimentary yts service wash though! - I never let the dealer give my car a complimentary service wash.
At least if they did a full picture survey of your car when you took it in, there’s irrefutable evidence that it was undamaged when you took it in, so they can’t deny it happened while in their care. I’d be wanting them to pay to have the damage rectified at a place of my choice, plus getting the car professionally detailed after the paint repairs have been done - a good detailer will be able to polish out any scratches that don’t ‘catch’ when you run a finger nail over them. Only the deep ones should need to be repainted.
Good luck, I hope you get it sorted to your satisfaction. Let us know the outcome of your discussion with the manager.