Failure to Cancel a Telkom Fixed Line Service

My business has operated a Telkom landline since 1999 and generally the service has been reliable. However, the company has recently been discontinued - mainly because of the pandemic. As a result I app**** for a fixed line cancellation on 28 April 2020, adding the required supporting documentation, and giving the mandatory 30 days notice. To date - 30 June 2020, the line is still operational and my request has not been processed. My understanding is that for early termination of contracts there is a penalty. So be it. However, multiple reminders have been forwarded to no avail. No one responds. When trying to log on to the Telkom website to manage this issue myself, I get feedback on the screen to say "no account" and can thus not continue. Two complaints have been logged, one via "Talk To Us", but no one responds. I am at my wits' end about what to do, and consider this a most difficult experience. Has anyone had such an experience and is there any advice on how to proceed? I would be most grateful to hear about it. Mike G.