Failure to release fibre line for weeks - Telkom clueless about how to resolve. AVOID AT ALL COSTS!

I have had endless problems with Telkom ever since I made the (admittedly stupid) decision to retain Telkom as my internet service provider when I had a Vumatel fibre line installed in my home in late 2016. Despite repeated assurances from Telkom that it would NEVER happen, Telkom ended up double billing me for over a year - for both ADSL and my fibre line. I had to send dozens of emails for over a year before I eventually managed to get a refund and my account closed. Once again, though, Telkom managed to make a mess of my cancellation - Telkom still has not released my fibre line so I am not able to get another ISP. Once again, I have sent emails every day for over two weeks, have spent hours on hold only to have my call mis-directed, people hand up on me, and pretty much every department I speak to (by phone, email, even chat) refusing to do anything to help me, beyond telling me that it is not their problem, and that I have to contact sales / technical services / cancellations - all of which I have contacted and NO ONE wants to help. The most frustrating thing is that I keep on being told to call 10210 or 10213, but I don't have access to a landline so this is not a viable option for me unless I want to waste R100s being kept on hold for hours. No one is willing to give email contacts that actually work - I keep on getting boilerplate replies (after days!) saying that the relevant department will be in touch, which they never do. Even the emails listed on Telkom websites / community boards don't work. And in the meantime, I have been without internet for weeks, which is negatively affecting my ability to work / earn a living.