DSTV bad service

As a paying customer, I have not been able to get the service I paid for, for more than a year. The decoder loses signal. I did all they wanted me to do (hard reboot, taking decoder to shop, calling installer) but when I get back home it plays a bit and then loses network. Dstv catch up on the decoder just shows limited programmes. I have called the call centre, asked for the matter to be escalated twice. I was told I would be contacted between 2 to 24 hours... it's been a week and no one has called me. When I ask to speak to the managers, I'm told to wait as they are in meetings. The waiting will range from nothing less than 30min to over an hour, only to be told the will call you back but don't. It's really frustrating especially that it's been going on for so long and that I even had to go watch the Rugby World Cup Final elsewhere. This monopolizing of pay TV really show disregard for the user. It's like they just want your money and don't care about you or what you want to watch.