Frustration with Cancellation

I have been trying to cancel my wifi contract for a while. Everytime I get through to a consultant, I get told I need to go to cancellations, as soon as I get tranfered, the call gets cut off. Then I get told to phone 084143 - and that number does not go through. I have been told to e-mail and I get no response. I have taken out a contract with Cell C for a fibre line, and I no longer need the cell c wifi data ****le. Now I am staying with the same company - which is starting to look like a mistake if it is so hard to cancel something that I have not been using for months.