JOB NOT DONE PROPERLY

I took my car to Mc carthy (Nissan ) germiston in June and was not moving when it went there, everything was done but not properly to customer satisfaction timing was not set properly by them as they were fitting the pump, I logged complain on the 20/11 and the same person that I complain about his service hes the one who respond to me and I was expecting someone from complain dept to call me to hear side of my story because information that is on his email is not correct becaseu hes defending himself and none of the person called me back acfter I make it clear on the email that I was expecting someone to call me not Matome , till today no one has come back to me and im not prepared to pay money becaseu they did incomplete job and from there he want to blame me, if the car was not moving and was fixed from there was moving why there is no power surely they were supposed to do complete job and he never told us about the power while the car was with them he mentioned that after they test the car , why they didn't test it before and inform us not after cause was been there for two months without progress I had to complain to the branch manager then was attended to.