CruzControl37

Hey guys,
So I recently had some interior reupholstered, and they took off the door panels to reupholster the door insert. However when I got the car this morning, both the windows are not working at all, and neither are the unlock/lock controls. I tried the window reset but that didn't work. The key FOB is able to unlock and lock the doors, but it won't lower the windows when I hold the unlock button. Any suggestions to what it can be? The windows are currently rolled almost all the way up. The re upholstery guy said he'd pay for the diagnostic, but I'd have to let him know what the cost is. The dealer quoted me up to 3 hours of work for a charge of $420. I'm just wondering if anybody knows what it might be?