Terrible Service (****ed off customer)

On the 28/04/15 I picked up my brand new 2015 model VW Polo Vivo from the dealer, on the 29/04/15 (evening) the car did not want to start, I then called the towing company who towed it to the dealer the next morning. They advised that the problem was solved and that I wouldn't experience it again, they also advised that they would then go ahead to do the electric windows and smash and grab if I agreed (which I did) . I got the car back on the 6/05/15 and on the 9/05/15 I tested the windows as I had to wait 48hrs after the smash and grab was done I then experienced that the passenger side window only opens from the driver side door but does not close and it doesn't open or close from the passenger side. When they did the job on the windows they also som2how managed to damage the driver side door knob (open and close knob) it is smashed up and goes right into the door. The epc light still flashes even thou I was told it would neve happen again. This is completely unacceptable and I do not want this car. I opted for a brand new car so that I would not have to deal with all this unecessary probems. Vw either give me a new car or I refuse to pay for something that I am not happy with.