I don't blame DDE for being unhappy. They agreed to the extra $5K payment but on top of that, they were apparently hit with other charges they weren't told about, plus they didn't get the usual "new car delivery servicing" with the BASIC one being that the dealer presenting them with a clean car.
However and to be fair to the dealer (*as unpopular that may be, given everyone's posts so far on this thread*), it may have its own side to this story such as:
1. DDE insisted on getting the car ASAP so the dealer wasn't given time to clean it up properly. Or perhaps (?) there was a COVID-caused delayed delivery to the dealer and there was a set date for DDE to pick up the vehicle, so shortly after the car arrived at the dealer, DDE's transport arrived to pick it up? But if so, I would have expected the dealer to contact DDE to let them know there was no time to clean it up.
2. the dealer routinely charges for all the extras on DDE's bill, such as the $699 admin fee", the $499 "platinum key and remote exchange", and the $769 "tire and rim protection" and unless the customer says otherwise, those charges are automatically added on? This last one sounds fishy though, if DDE wasn't ever told anything about those charges. I'm not familiar with the "platinum key and remote exchange" but my Web search points me to "First Canadian" (not GM) providing that coverage for lost or damaged key fobs and it seems odd to get that coverage w/o specifically applying for it. As well, I was told by an Alberta Chev dealership that GM did not offer tire/rim coverage for Corvette's run-flats and if not, this would also be an after-market non-OEM warranty and again I'd be surprised it was automatically placed with a vehicle w/o the buyer filling in the appropriate paperwork. When purchasing a new vehicle, I've always had to fill out this type of paperwork for any warranty items beyond the standard manufacturer vehicle warranty.
I note for reviews the dealer (if you put much or any faith in them) show:
-a 4.3/5 rating after 125 reviews on its Facebook page;
-a 4.9/5 rating after 31 reviews on the "DealerRater" page although the last 4 were all 1/5;
-a 2.5/5 rating after only 3 reviews on Yelp;
-a 4.1/5 rating after 338 reviews on "mobials.com" but the last reviews were in 2016;
-no reviews with the Better Business Bureau (BBB) and 2 resolved complaints, but hey at least it's registered with the BBB.
I'd be curious to see what "Moepig777" is able to find out about the dealership, but keep in mind it's easy to slag someone or a business, when you're only getting one side of the story.