Telkom: consistently ******* service provider

The service from this provider has been consistently shocking even after my account has been confirmed as closed.

On approaching the Telkom office to cancel my account in November 2019, I was instructed to settle the invoice in full as the account could not be closed if any money was owing. This procedure was followed with the service cancelled. Such step confirmed by Telkom via email, with a cancellation order number.

Why then, 8 months later have I been receiving phone calls demanding that there is an outstanding balance owing? Incredible the inefficiency and rude behaviour of people representing Telkom.