Poor service from call centre

I got an E48 error message on my screen and called the call centre on 2 separate occasions and was given the same advise to switch of the decoder and disconnect the cable. If this did not work I needed to call an installer. I called an installer who walked in and within 30 seconds changed a few settings on my decoder and all was sorted. Obviously I had to pay a R480 call out fee!! When I called DSTV they said they would investigate??