Delays in refunding customers

i bought a car from Germiston branch on the 19/04/23 and on the 25/04/2023 I had a breakdown. I informed my salesman who then arranged for the car to be towed back to their branch for further investigations. No progress report was given to me with regards to the status since the car was towed to their branch up until I called salesman on the 28/04/2023 who then informed me that the car is in line to be checked. On the 03/05/2023 I decided to go to the Silverlakes branch to speak to the complaints manager who then assured me that he will follow up on it. he came back to me on the very same day informing me that the car needs a complete engine overhaul meaning that they are going to cancel the deal and refund me money for the car. On the 05/05/2023 I called sales manager by the name of Margoo Saaiman who then informed me that they bank confirmation letter which I sent there and then. Today i make a follow up with the Margoo, I am told that they are still assisting the salesman to do the refund, meaning that it is still not processed. Their level of service to customers requesting their refunds is so disgusting to say the least, they are quick to take your money and slower than a tortoise when they have to refund you. 72 hours refund policy is not applicable to them, they should just remove that thing on their website.