Poor and uncaring customer support from We Buy Cars

Bought a car just under R200k. Excellent Dekra report and a short test drive went well. On receipt of the vehicle after the sale, I heard a noise in the engine which I had noted on the inspection report before taking ownership of the vehicle. The essence of my complaint is that the Sales Agent did not assist me by suggesting that the vehicle remains behind and that will sort the noise. After a few days the noise got louder and I opted to take the vehicle to the agent for major service and for a report on the engine's condition. The agent informed me of a faulty water pump as well as a faulty turbocharger (not reflected on the Dekra Report prior to the sale). I raised the mater with the Warrantee insurer who said that it was a pre-existing mechanical fault not covered by them. I got hold of We Buy Cars Customer Care and was assigned a person to deal with my case. I am yet to get a response from the We Buy Cars agent, and making matters even worse was that MIOSA claimed that I should have taken the vehicle back to We Buy Cars instead of going to the agent. Their logic is that the vehicles agent tampered with the vehicle to find the faults, thus in the process not affording We Buy Cars to sort. In the end, I had no choice but to cover the costs of a faulty engine as a pensioner running into 10s of thousands without any compensation or care from We Buy Cars. As far as I am concerned, their Customer Support is not existent and they don't care about the customer... they only care about making the sale. W.r.t. MIOSA, it seems that their primary interest is in the car industry, and also do not support the cause of the customer as they should be doing is. having the ability to distinguish write from wrong and providing good sound advise in terms of the Consumer Protection Sct, as well as facilitating an interaction with We Buy Cars. The MIOSA investigation in my case took one whole day for them to reach a conclusion that I have not case, in writing.