cant answer for the key ,the locking and unlocking of the doors is just a program of the car need to get the manual out there is a a button or two you have to press for a couple of seconds which activates it ,
you can return a car within the first 30 days if there is a major problem that cant be fixed or a problem that has been logged within the first 30 days and carrys on afterwards,dont think they will change it for a key ,play your face get a service free .