Not willing to help customers

I bought a brand new 2018 polo vivo last year in March which is only 1 year now but it is giving me hell of experience that I sometimes don't even go to work or places that I want to go to on time simply because it is locking the back wheels and can't move. I've sent it to Barrons Pietermaritzburg 3 times already in which few weeks ago its locked the back wheels while I was at work totally & I phoned VW SA who organised Barrons to come & tow it from work and it took me 3 days to get it back & I was suffering without a car but it is still not sorted as it is still locking wheels even now that we ended up not going to church yesterday as it did the same as usual. The sad part is that VW don't even bother to give me courtesy car or take me to where I want to go to during the times when I'm suffering but I have to PAY THE FULL INSTALMENT for this car every month. I have spoken to my sales person who is Kelvin at Alpine Motors in Pinetown and he said he is just the sales person he cannot help me plus I spoke to Shannon whom I supposed she is the manager or dealership manager at Alpine Motors Pinetown and she was also not willing to help me. I am really ****ed off & need this sorted as soon as possible otherwise I'll have to take this to the next level. My contact number is ********** and my ID number is 791 ********** 085. I regret choosing VW, to me this is a manufacturing fault and my car is still on warranty so I don’t understand why it is a problem for VW to keep their warranty promises or misleading customers it their MOTIVE.