Telkom: Landline service: useless & pathetic

I have tried numerous times to close my mothers telephone account without any success. Sent e-mails, tried to utilize the Telkom website, no help, no assistance. I received notice the account was closed, an outstanding balance amount. During Oct 2020 I got a invoice again for an outstanding amount of R3000. I disconnected the cable from the junction box September 2018 already, don't use ADSL internet since then either. They have no idea how to provide a service or manage it!