Wow that sucks. With 700+ miles I seriously doubt they will give you a new car but I would definitely make sure they fix the damage. New door, repaint etc. Any decent body shop can do that and nobody will ever know.
2014 Grabber Blue Mustang GT Premium with nav, RR and comfy packages, 3.73 limited slip axle and optional 19" machined aluminum wheels
Mods: Boss 302 exhaust with QTP electric cutouts, Borla S-type axle backs, BBK Black Out CAI, aluminum Ford Racing coil covers, Steeda short shifter & bracket, Ford Racing Handling Kit, SHR window louvers