Telkom still sending invoices a year after cancelling account.

I cancelled my Telkom account in November 2017 but they continued to bill me after the account was cancelled.

After hours wasted on emails and phone calls, Telkom finally cancelled the invoices for the account I no longer had, however, they sent through an invoice for the late payment fee for not paying the invoices they sent after my account was cancelled.

A year later I am still receiving Telkom invoices for the interest on the late payment of invoices that I was not required to pay. Telkom please sort this mess out, it's growing tiresome.