Diecast, you are being very reasonable (almost too nice) with these guys. First, to let a car sit on a flat tire like that is just silly. If I were you, I'd def ask for an extended warranty. I think that'd be a pretty fair compensation.
Current: 2008 BMW M3 Sparkling Graphite/Bamboo Beige/6MT. 1999 BMW M3 Techno Violet/Dove/5MT