Very disappointing

I bought a Mercedes 2 months ago with Webuy cars at the Dome. What a nightmare. At first I thought it was a good buy as it was very good condition there were maybe just a few scratches on the bonnet. After a month the engine light went on and the car all of a sudden had problems and the turbo was not kicking in at times. I took it to mercedez in Constantia. They done a diagnostic and the car had a list of problems. It was so scary. The amount of money the car is going to Cost to repair is unbelievable. The diagnostic is R3000 and the quote is R70 000 and thats not all the errors. Mercedes advises that the ad blue system is not responding so webuy cars has cleared all faults and reset everything. The car was in a bad accident. I'm paying so much for a car that's in such bad shape. Please guys do not buy a car from them. You will end up buying trash. Please beware.