NMI Ford Pinetown: worse customer service

I took my car to NMI ford Pinetown about a year ago, it had an issue of mixing water with oil. they claimed from my warranty after a month my car came back. 2 weeks later from that, it had another issue, turbo and engine leak issue. they claimed again from my warranty i took care of the shortfall. from then I have been visiting them every month because the car was still leaking, and the water bottle was always dirty. they kept telling me that the car is fine, its just stains from from the repair working, until i got a second opinion from another repair garage, they scanned the car, they gave me the report that the car is still leaking. i took it back to ford with the report. this time they're telling me that its their fault the turbo that they initially installed is faulty, they will replace it with no extra costs from me. they took the car for a week, fixed it, i collected it on Thursday. Friday the car has no coolant, i poured water, i went to work i checked the car, no water again. i called them again they told me to bring the car on Monday. i took it to them they checked, they said they can't find the fault, now this time they are telling to pay R9700 for them to strip the engine and check for fault, mind you my car didn't have this issue before i took it to them. now I'm just stuck with a non-runner at home because I'm afraid of blowing up the engine.