Ford Tzaneen killed my car

On the 27th July 2015 I took my car to Ford Tzaneen, the presenting problem was water was mixed with oil, it cost me R7048. I was told my car was fixed and that it was ready to be used again. I took my car on 5th August and told i needed to take it back after i had driven 1500km because they couldn't clean all the oil from the engine and if i have any problems with the car i should bring it back and they would fix it for free this was witnessed by 2 people. 22 days later on the 25th August after i had driven my car for a total 452km I had smoke coming out of the engine and took it back to Ford. On the 26th of August i was told that the car needed a new engine which i have to pay for. <br> <br> I have been to Ford in Tzaneen twice since April. The first time they worked on the engine and the turbo in April for R11,000. Then in August because water was mixing with the oil for R9,000 Both times they have worked on the engine. Now the engine has died and I believe they killed it, they are the experts, hence in good faith I took my car there. There was a clip that had come loose and oil had come out and sprayed all over the engine and was no longer in the system. They didnt tighten it properly!