NON-COMPLAINT TO THE LAW AND BAD CUSTOMER SERVICE

I bought a second hand car, Peugeot 407(2005 model) from Westvaal in Welkom in February 2019. The told me that the car is in good condition. Beginning of July 2019, the car showed a sign of problem in the gearbox and went back to them to inform them about the problem as I don't use the car for daily routines. They sad I must bring the car they will check the problem for me and I did give the car to them. They then called to say they can't diagnose the car and instructed me to take the car to Peugeot in Welkom. I did take the car to Peugeot and the car was diagnosed and fixed the gearbox problem and had to pay for the expenses out of my pockets. I went back to Westvaal to give them the information and how much was due to Peugeot and they said I should pay for the car and bring the receipts and a copy of my bank statement and they will refund me the amount I have paid. The payment was not processed and I would call and call them and they said they are still busy with the payments. To my surprise when I went there today to check how far with the processing and they said they have rejected my payment . I did ask for reasons and they say they have no reasons. I made the manager who was very rude about the law regarding second hand vehicle sales but he refused to listen and gave us a stinky bad attitude. Please assist.