Do the right thing and re-sign the papers. Personally, I think it's no excuse, as well as wrong, to "penalize" a company because one perceives rude treatment from an employee...there's a correct way to handle that...besides, receiving something one has not paid for is theft. I've read countless posts complaining about dishonest car dealers...there are no degrees of dishonesty, nor does it change into something else when it's the customer taking unfair advantage.
2013 Porsche Carrera 4
2011 Panamera 4S; 2012 Mini CooperS
Prior BMWs: `05 645CiC; `07 650i; `08 M6 convertible; '08 135i; `11 750ix MSport
"You think that's air you're breathing now?"