Sorry to hear, as far as your issues it’s a matter of how good or bad the dealership is or wants repeat business. Thus far it sounds like, they covered it up but now that they’ve been busted they are willing to spend some money.
I had a similar issue on a 16’ Colorado Demo I purchased with 4K. Found all kinds of things wrong with it once I brought it home. GM replaced the windshield, passenger seat “leather” and repainted rear bumper/gas door area.