Zero service, but continued invoicing despite requests for cancellation

On either the 21st or 22nd of November 2019, my ADSL and landline went down. I was informed after a few days that Telkom was no longer able/willing to repair the line which had been vandalised more than once previously. I immediately logged in to Telkom's online portal and requested a cancellation of my service. I received a notification SMS in this regard, but nothing further. Subsequently in December 2019 when I received an invoice I followed up again via the Telkom portal and again in January 2020. Telkom never once contacted me to complete the process. I subsequently started ignoring their monthly invoices as I had not had a service since late November 2019. Today, the 5th of July 2021, I received an SMS indicating that my account is thousands of Rands in arrears and that Telkom are going to suspend my service if this is not paid. What service, Telkom? I have not had a service in more than 19 months and have more than once requested a cancellation!