Dishonest and *****, ******

I took my KB 3000 there because it didn't have power, I waited 3 weeks and after going Ther and complaining about how I always see my car packed ouside and no one attending it they told me that the problem is the turbo so I have to buy a further 6000+ after paying the diognostic charges. I waited again and they called me to come and collect the car, to my surprise there car still has the same problem,I'm now stuck with a new turbo and the still doesn't have power.