Bad Service & improper mechanical fixing

What a bad experience received from this company in Roodepoort, was referred by someone from Tonneau covers within the same vicinity to take my car there for mechanical fixing, after they checked, they confirmed that there is a leakage of water and oil and they charged me a huge amount as they stated that they have bought new parts from Ford only to find out that the parts used were secondhand parts as after collecting my car, it was worse than before I took it there, the pipes were bursting, water was coming off and the oil was still leaking, the same day I collected the car even before I got to my work place, I phoned them and they said I must arranged a tow vehicle to towed it there, I did the same as I was willing for my car to be fixed, after a week they told me that the car is ready, I went back to fetch it, couple of days after that the pipe burst again and leakage of oil is still there, speedometer not working, and when I asked the owner Ernie, he said the car requires an auto electrician to check it but I said to him please arrange to come and towed the car back to your service centre to fix it , he refused and gave me stories and afterwards decided no to take my calls or respond to my what’s up, I organised a towing company to tow the car from the place where it got stuck to my house, I kept phoning and sending what’s up with no luck up until I made a plan to get my car fixed. I paid him a lot of money, over R20 000.00 with nothing done on the car. I need help to get my money back. What a bad service I received.