Nissan Milnerton - If you want your car, stay away!!

3 Weeks at Nissan Milnerton and I still don't have my car back, they can't even tell me what's wrong with it. I took it in as the aircon stopped cooling. The vehicle is still under full warranty, but they obviously try to take all the cheapest routes in attempt to solve the problem. After multiple calls and emails - still no reply - don't even know if my car is still there.