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.
2008 E92 M3: Sparkling Graphite | Bamboo Beige | 6MT | CF Roof | HRE | Catless Eisenmann Race | BPM Sport | Swift | Arkym | Mode Carbon | M.Perf