Useless service and billed for canceling non rendered service

I have been having a problem with my fibre for the past 4 months I continuously call fibre department who reset but problem still persists i have been promised that technicians will come but nothing. I have to call daily now as network is always down I can stream over an hour without it searching. And I only connect 3 devices. I have asked to cancel as I am paying for a service im not receiving but I'm given a cancelation bill of R2595.47. I spoke to a guy named Kwanele who than put me on hold for over 30mins I asked for his name now he is Bongomosa Dlamini and apparently in the 30mins I was on hold he was communicating with his manager Nolwazi Khumalo who advised him that they can't help. Why am I being made to pay for something that doesn't work vidacom can come take their useless devices and leave me in peace I will get another service provider who know what they are doing. I have been a loyal client for over 10 years but I'm treated like a piece of *******. I had enough