Bad service

I bought 2 cars I December from the dealership, 1 car was VW Tiago and the other car was a Demo JAC T8 4x4. When I bought this car the car was supposed to have been taken for service because it already had over 11000 kilometers, but these people gave me the car just like that, I had to figure it out for myself that the car had never been taken for service. That was not the last problem I had with this car, the came without the roof rubber l had pick that out for myself also, no one bothered to tell me since it was so visible that it was not there. The car also came with a cracked wind screen, they changed the screen but soon after the rear view mirror fell on my lap soon after it came back from fixing the screen at glass fit. I took the car back to them again they do a bad job and fix the mirror with a cellotape, I've never been so angry that I buy 2 cars from these people and they still don't value my business. Today I has washing my car, the same car has had a dent or been in an accident and no one bothered to tell me and I also had to find it out for myself. The black plastic thing above the wheel has mud that is use when you cover the Crack or a dent in the car to paint. I am really disappointed with this kind of service and the way the undermine me from the time I got the car.