What about warranties

I purchased my brand new Polo Vivo in Sept 2014. The very next morning I informed the sales person that the wiper was jumping. He said to bring the car in so that they could sort it out. I went in later but the workshop was closed. I later told him that the radio stays on after I puled the key out. Now months later I'm still fighting with them because the sales person had left the dealership some 2 weeks after I last spoke to him.<br> When I took my car in for service the workshop told me to replace the wiper blades and I refused because the problem would not be fixed. After some back and forth between myself and the workshop (and with no real evidence that I had spoken to anybody - denials etc, I eventually I emailed VWSA who intervened and directed the matter back to the dealership. Some more back and forths ... After 2 such emails to VWSA, the dealership replaced my ignition (manufactured and imported from Germany I'm told) and wipers on 11 May 2015 ... Will have to see how if the problem is resolved as I haven't driven the car yet