webuycars sold me a faulty vehicle

i bought a 2015 Opel Mokka at Webuycars Nelspruit around July 2022 and it was transported to Germiston, i drove the car 4 times and is broke down , showed an engine, its the 16th of December and it is still at a dealership not fixed .dealt with Jason Afonso, who is not responding to my emails nor my calls and Mark Roothman, and also they **** about taking the car for service