Pathetic after sales service

I bought a new Polo 1.2 TSI Comfortline. <br> After 25000 Km's the EPC (Electronic Power Control) light came on. the car went in for his 30000km's service.<br> I raised the incident to the guy who was doing the service (A D Van Dalen). he told me that it was the petrol that i used. He said that i have to use 95 Unleaded from Shell. I changed the petrol. Two weeks later the car broke down on the N1. It was towed to Hatfield VW. The guy who was working on my car then was Danie Muller. I got my car back and drove +- 3000km's. The Light came on again. I took the car in immediately. Since then my car has been going in and out of the branch with the same problem. They gave it to Paul Vermaak to fix, he works in the problem cars part as they call it. I spoke to Peter Bosman after my car went in for the 3rd time to either exchange the car or to be refunded. He told me that VW does not exchange or refund vehicles. my car is in now for the 5th time. I sent Nicholas Malec (Dealer principal) an email to complain and exchange my car. Since Saterday the 07/11/2015 I haven't heard from them. The head office of VW said they will investigate, 48H Turn around time. Haven't heard from them.