Multichoice POOR customer service

I have been contacting the DSTV contact centre for 4 days now. I had a primary and a secondary decoder installed. For 4 days the secondary decoder has not been working. Each time I call which has been a total of 8 times I have spent 25 minutes per call. Each time I called I spoke to a team leader. Firstly the team leader Roslin was the first to log my issue and said she will attempt to sort it out by the end of the day, which was Tuesday. She called me once and then I never heard from her again. Secondly one of Roslin's agents that I spoke to was absolutely not at all interested in helping me and as soon as I asked to speak to her supervisor her tone then changed. Then she started shouting over me while I was talking. What bad service!!!So since the begining my initial interaction with the DSTV contact centre has been utterly DISGUSTING. The next day I spoke to a Harriet, another team leader. Who promised that she would get the technician department to contact me. Out of everyone I've had contact with thus far she's the only one who kept her word. Once the technician department finally contacted me, they couldn't fix the issue, they then said they have to send it to that advanced technician team, which was two days ago after promising that they will get back to me the following morning. What bothers me most of all, each time I want a update I have to call. This service which I'm getting is absolutely PUTRID. Eventually today I called once again, spoke to another team leader Tanya who I told I want this issue resolved and that I would like to be called back in a hour with some feedback. I DISTINCTIVELY told Tanya that I would need the call to be before 2 as I will be unavailable. After promising she would contact me she never did. I have been dealing with this issue for 4 days and still this isn't resolved. Ultimately I have been paying for a service I haven't been receiving, I'm so APPALLED by the way I'm treated and these empty promises.