I am really glad we have some D/C people on this forum, both technical and administrative.
I hope it gets resolved for you in the way it should!
But if it doesn't, here is a killer item you should list as 4-B:
As a last resort, I will contact all of the consumer affairs representatives within 100 miles for all newspapers, radio, and TV stations to see what assistance they can offer.
That is absolutely the last thing this dealer is going to want - a bunch of reporters asking pointed questions about horrible service.....