DSTV being ***********

I am not a person who easily gets this angry but honestly what kind of business is this?! I got a DSTV decoder with the R600 package which is supposed to include all the channels. We set it up and it didnt work, called the call centre they couldnt help us and told us to call in an installer(which costs about R700!). Did that, he came in and did everything we did, it didnt work, we had to call the call centre again so that he could speak to them. Finally they sorted it out, it worked, the next morning when we wanted to watch TV it didnt work again saying something about the signal or installation being poor. I had to sit on the phone with the call centre again for 25min! They tell me my signal and quality is poor and i need to get an installer in to check it they make me reset the decoder o factory settings, now its not displaying all the channels, and everytime i want to change the channel I have to fricken reset my DSTV decoder to factory settings. Now the call centre says theres nothing they can do to help me. I am paying a lot and I refuse to pay another R700 for an installer to come in everytime for a problem that shouldve been fixed, I might as well just cancel my account!