Be honest and declare all faults

Bought an Renault with clear Dekra report, sales took me for test drive, he was driving discovering that the when i took the after paying clutch was faulty, calling back it was said that we can try fighting it to replace clutch plate, at the end i did it myself with an cost of R7200. 00 only advice i can give to buyers drive the car your self even with an clear DEKRA report, you will loose what ever way you try. I trusted webuy cars cars but now I'm doubting