Thank you for your advice, doc. I hope they understand, and I keep my temper under control.
I am not entirely displeased with the work they did. It looks OK. It's the fact that it's going to cost a lot of time and money to replace the parts that were unnecessarily upholstered that pisses me off. Here are a few pictures:

The snaps' holes are covered up, as well as the tailight access panel.

Overall, it looks like what I wanted, but I didn't want to ruin my factory pieces to get there....