Unprofessional and unskilled Bad service

My car was taken for some engine problems to your workshop and after 6 weeks i received my car back and few days later it stopped driving. I spoke to the guy called Tshepo (some supervisor) and Abram (workshop supervisor) some supervisor, he promised all sort of things and today i called and he tells me the car is still not ok after a week with them and after making promise the car will be ready today. Worst of all he told me he is not involved anymore i must talk to technical people after he made commitments and then if i want i must come fetch my car. Never take your car there.........