Bad service

I toke my Chevrolet utility Bakkie in for a 35000 mileage service a month ago the service adviser never to be reach I have have to phone het (Nigita)I'm On a daily bases asking how far is my vehicle According to her every time she has to log a new fault then she never come back or resolve it cost of the repair runs into R14000 where I have to give half now there's al of a sudden more repairs on the vehicle That cost R16000