Bad Service

I purchased a brand new car from this dealership and three months after I purchased the vehicle I experienced problems. The vehicle went twice to them to resolved the issues which I was experiencing and when the vehicle is collected they confirm that all the issues have been resolved and it wasn't. The dealer principal hasn't contacted me after numerous emails sent. I also sent emails to the new vehicle sales person Trudie and the service manager Werner and they also still haven't contacted me as well. Where is the customer service going to in South Africa its really getting bad, once they sell you something they wont assist at all after that when you have problems.