WHY SUCH BAD CUSTOMER SERVICE??

My sister is being messed around by Shamal ***, She took her car a Silver Chevrolet Cruze L, reg BR47CX-GP to GM Cresta on 05 April 2016 for only 2 problems to be diagnosed and repaired,<br> 1,Engine light<br> 2,ABS light <br> First she never got any feedback until she started chasing up, she was told some technician would diagnose the problems and call her with feedback, instead someone called and told her to them back, She is customer I dont understand why she was told to call someone to remind them to do their jobs, <br> She then was told to pay around R900 for the ABS warning light diagnosis, nothing was said about the Engine warning light, and then shez been told to pay close to R3000 for the Engine warning light problem repair??, <br> Maintenance Plan people said they want one quotation for both problems after diagnosis done so they can authorize and pay for everything once, <br> Can we please understand why is she being Inconvenienced like this?<br> Is it because she is a woman, have no clue about cars?<br> Or maybe someone is Not doing their jobs properly because they dont know how to or they just dont care?