WeBuyCars worst experience

I had the worst experience as the first time car buyer at WeBuyCars JHB south. I made a purchase last month of Hyundai I20 2019 model. According to the dekra report there was no issues with a car it was ready to go. On the day of collection I was informed that the car had an issue with a clutch and it must be replaced, I left the car behind and was called a week later that it's ready again to be collected. I took the car and I didn't even make it home. The car had to be towed back to the dealership. Since that day I don't I've been sent from piller to post because now they told me a new gearbox must be fitted but when it comes to authorization it's a problem it's almost 2 months now of a purchase of a car I've never even used. No one wants to really assist.