Bought a car for my son. Vlad the salesperson was ...

Bought a car for my son. Vlad the salesperson was great. However, I asked them to replace a tail light before delivery. Figured that was easy enough... They delivered the car without fixing the tail light. If you can't get the little things right - how are you going to deal with the bigger things guys? Did you even service the car before you sold it? Also the map on the navigation worked when I test drove the vehicle. Does not work now. Unreal...