Bad Service - I dont want to be with CellC

I took a cell-cfibre contract recently and was assisted by one of the Area Manager's. I initially took a 10MBps line and later advice by one of the sales people that the 20MBps is a better package as it comes with black TV. I spoke to the Area Manager to upgrade me to a 20MBps line. However when the installation technician came to install on the 20th of July he didn't have a box TV but after talking to the Area Manager he then gave me the one that he had for another customer. But to my surprise the line was still a 10MBps. I sent a series of emails, phone calls and only got upgraded yesterday to a 20MBps line. Immediately after I received an email that my black TV will be activated pending my upgrade to a 20MBps. I again called a few people to try and get access to black TV to no avail. I have been with Cell c for a very short space of time and as a new customer I am really frustrated. I asked a few agents that I spoke to if there are processes to follow to elevate the issue but was told there is none. In not so many words I was told to take a chill pill. I am wondering why I am still with Cell as the service rendered is far below acceptable. I am continuously moved from one division to the other with no one taking full accountability.