Total dissapointment in a brand I loved

I currently own a 1400 TDI Polo and VW South Africa seem to unable to maintain it. I have taken it to Highveld VW ( Lydenburg) and they could not repair the problem after three tries (+/- R 6000.00). Allan Hudson VW (Nelspruit) as I was referred there by Highveld VW could not do so either. They charged me another R 6000 and my car is still not repaired. As a matter of fact there are now new problems with the vehicle that were not there before. VW Allan Hudson actually had the vehicle for 3 weeks and when I got it back, was in worse condition than before, not even mentioning the ****** I got complimentary on the floor of my car. They also charged me R 800 for fuel to test the car that does 6.0L/100Km and only drove 500Km since they had it,. The first complaint I laid was to Vw South Africa, they sent me a customer survey a week and a half before I got my car back. Allan Hudson called me two days after I got my car back and I reported the new problems the car has and the fact that it was still not repaired. I am still waiting for them to call me back as promised.