Michanic ****med me

I have called in Michanic to assist me with car which was not accelarating as it should. Mercedes Benz A200, well kept and serviced vehicle I love so much, Michanic always came and never assist. The sad part is I have been paying diagnostics amounts they requested and then the amounts they need to resolve the issue, which runs to thousands of rands and to this day I'm still have the issue with the car. I fee ****** and disrespected as a client. I don't know if I was ****ed or just working with people who are not mechanics. I wish no one deserve to be treated like this. I work hard for my money and people you think are here to help, turns out to be the ones who rob me. But I believe my day will come and justice will be served.