Bad buy from We Buy Cars in Midrstream

I bought a vehicle in Nov 21 from them for cash and we drove the vehicle for 2 weeks and since the 10th of December 21, that car can no longer be driven as the Thrust bearing has gone through the clutch plate and this was not on the actual Dekra report. We took the car in before this happened and we got a quote for R25 000 for more items that needs to be replaced on the vehicle as we found a shudder on the steering wheel at 110km/h. We informed them of this and since then we only kept on getting messages that they are still waiting for feedback. After numerous phone calls I eventually got a letter from them telling us that the we bought the car like that and that they are not prepared to take the car back or get it fixed. The sales consultant at the time told us that if we do find any problems with the vehicle that is not specified in the Dekra report that we should contact them immediately and they will collect the car and sort it out. That never happened and now I am stuck with a car that I paid R51 000 for in cash that I now have to get fixed and the costs now for that is almost going to be R8000 just to fix the thrust bearing together with the clutch. Then there is still the additional R25 000 for the control arms etc. They even **** on the letter that they sent to me stating that we drove almost 1798 kms with the car which is not true as we bought the car with 106798 on the ODO meter (Dekra photo confirms this) and we only did 1008kms and since then this car has been standing in the parking as we cannot even get it into gear.