Poor Service

I took in my car for a service on the 9th of September 2015 and after fetching my car they said there is more work to be done. They gave me a list of all the problems. When I drove home after about 1 kilometre the car don't want to pull and the car did not had any power as made that ref sound. I phoned them the next morning and was told to bring in the car again which I did. I was told that I need to replace the clutch and that there is rust in the radiator and some pipes need to be replaced. I paid in R8 550 for the repairs. I phoned them after about a week and was told that the parts were ordered from Korea and it can take up to 21 days. I was phoned on the 9th of October to fetch my car as it was fixed. when I drove off the car was doing the same as after the service. I took it back immediately and was phoned on the 13th of October to fetch it as it was now fixed again. I drove off and the car was making a strange noise and it sound if there is something loose. After about 10 kilometres the car was doing the same. No power and the car was still making that ref sound. I phoned them this morning and was told to bring in the car again so that the manager can drive with me.