Very very poor service

Due to my car that had major dage, I wrote a letter to VW SA about certain concerns I had, letter was send on 13 March 2015. Till date I have not received any feedback from VW SA. I also raised my concerns with Lindsay Saker and was informed that the work that they were doing on my car was sufficient and nothing else needed to be done, that my car would be as new. After 7 week in their workshop, I finaly got my car back and went straight to a VW dealer to trade my car in on a new model. This time the concerns that I raised came up and due to me being honest about what happend to my car I was not offered the best price for my car and now I am not able to buy a new car. I specifically asked VW SA what garentees I had on the rest of my car, and now those issues are being held against me and I can not get a good deal. Once again for the 2nd time I am nos losing out due to VW. Very disappointed and wish I could change to another brand of car now.