Sold A Broken Car By VW

By the end of January I bought a VW Golf 7 TSI & four days later the oil light went on. I didnt take it seriously so I put 2L of oil into the car and all was normal. A week later the oil light went on. I called the dealership and they said I should bring it in. They inspected the car and said nothing is wrong and just poured oil into the car. A week later the oil light came on again. I called the dealership and they inspected it and the car remained with them for a 3 week. They told me they fixed everything & the senser was a problem and it cost they R11000. I was happy that it was resolved but I drove the car and a week later the oil light went on again. I called the dealership and they said i should bring the car in and all they did was pour 2Ls of oil and said that its going for a 1000 kilometer test. When it got to 800 kilos the oil light went on again. The car has been at the dealership for now for almost 2 months. I contacted VW SA and VW finances explaining the situation two months ago & VW finances said that it is not their problem, I must resolve it with the dealership. I have paid my second installment for a Golf 7 but I am driving a 2013 Polo Vivo. My experience with VW has been unpleasant & sadly I have already influenced several people never to buy a TSI because of my experience.