Sorry you've got a lemon. They happen in every product line occasionally. I've owned 7 Piaggio/Vespas and the only one that has ever had serious issues was the one I bought used from a guy who installed a stereo, changed to after market chip that was supposed to let him use regular gas without losing anything and a couple of things which developed electrical problems.
Your dealership and AF1 Racing reports that they've never seen the number of issues you've had especially the tail light one. So you may want to check your state's vehicle lemon laws. I don't know in your state but I know in California if you have to take something back 3 times for the same issue and the manufacturer is unable to fix it they have to provide a new vehicle.