Brandon Hyundai Brand new Veloster in the shop for the fourth time Brandon Florida

Brand new Veloster bought off the showroom floor has been in the service department for two new engines, air conditioner and hydraulics which the dealership removed from the vehicle during the last visit. Car is back at the service department today. Did the exact same thing as the other two times, completely shut down while driving. No one returns phone calls, will not provide a loaner car from the dealership. Car was in the service department 3 months the first time, 1 month for the second engine. We just want our money back at this point. The car was paid for in full on the day of purchase.