Telkom escalates its own problems by not communicating, thus has become unpopular

I was instructed by Telkom to cancel my Telkom fibre line/fixed line one month prior to it being terminated. I was moving from Gauteng to the Eastern Cape on 30 September. So I went to Telkom Menlyn offices on 31 July 2022 to do so, and was told to return 1 August 2022 to their offices to cancel the service, which I did. Upon consulting with an employee to cancel the service, she assured me after entering details on her computer that it was scheduled for cancellation on 30 September. I requested proof of such, and she responded Telkom did not give such proof, but that had been cancelled by her and that Telkom’s final invoice would be sent to me. In October I received Telkom’s statement. My mistake was thinking it may be the final statement. In September, now being in the Eastern Cape, I had some difficulties with my computer crashing, and distractions such as having to move twice in 3 months – this resulted in my not picking up on the September 2022 final invoice. I then received a letter of demand dated 29/11/2022 for an outstanding amount of R2,238.50. I telephoned Telkom numerous times on their customer care numbers to query the letter but could never get through. I also attempted to pay a portion of this amount via the route I was used to, i.e. my bank. However, Telkom did not recognise my account number. (I presume this was because the fixed line had been cancelled by Telkom and no longer existed). This letter of demand did not provide an account number for me to pay to, not did the telephone number they provide ever get answered to, not did it provide an email address, or any useful information. Again, before and after, I contacted customer care numerous times but never got through to Telkom. On one occasion Telkom responded by calling me back but I was put on hold for 27 minutes and then the call was terminated by Telkom. I sent several emails to customer care, but these were all ignored. (I can screenshot all these as proof). Finally - I made contact with Telkom’s ‘special forces’ on Telkom’s Facebook page. Then I received a statement dated 9 December 2022 with an account number and EFT ref number. Now the invoice was for R3,006.61. I then queried the invoice with Telkom’s ‘special forces’ on their Facebook page – there has been no response from ‘special forces’. My dispute is the invoice. I have been charged with subscription and usage throughout. This invoice is based on my not having cancelled the service effective on 30 September 2022. Could just have this resolved please? My September 2022 (final invoice) was for R735.00. The late payment should be based on this invoice, and I should be charged not for subscriptions and usage of the service after that. The late payment due also should not have charges added to it for November and December 2022 seeing that Telkom does not and did not respond.