Stay away from webuycars Silver lakes

I bought a car cash and was told it was category A according Dekra. Tested the car and everything was OK until I drove home. I noticed that it drove well on the freeway but had problems with stop and go roads. It started cutting off when stationery and got worse when the aircon was on. The only way to keep it on was to keep my foot on the accelerator even when it's not moving. So I called to request an exchange and they told me they can't help because the car now belonged to me. I did not understand as I had not received any registration papers and the car was still under their name. To make matters worse, the disc had expired and it took them weeks to deliver the papers. To cut the story short, I am stuck with the car. The Dekra thing is a big ****, don't trust them.