What's wrong with the forum for support questions?
Unless its warranty items, really, having the team of forumers like we have here, you could not ask for better service.
In some regards it is us forumers that aid customers to get warranty.
Many that try to sort their problems here first along side the official GM reps have pretty easy returns in the end.
Its good to know what is wrong before one asks for a return or warranty. "You know", it could be a lose connection or something easy to fix.