Disgusting service

My chana bukkie had a over heating problem,I sent my vechile to chana belville for evaluation,they then kept my bukkie for 4days an have me a quote of r6800 which I accepted in good faith,I received my bukkie a week later expecting it to be repaired on the very first night I received my repaired bukkie it didn't want to start,after some time it started,a few days later it started using water again an overheating,I returned my bukkie to chana on Monday 21/09/17 and when I called the receptionist told me That I needed to pay again for the same repair I had just made with them