Charged beyond cancellation

I requested that my account be closed over a year ago. I have just found that I have been billed for the last year even though the service was not used and a cancellation was requested. I also found that the is an entry on my credit report for an outstanding amount to be paid to Telkom.

I cancelled my account due to upgrading to fibre and not needing an ADSL line anymore. Please can you assist by ensuring the account is closed and that the credit bureaus are updated to reflect the correct information.

I have sent numerous emails but every one of Telkom's mailboxes are full and I am having no luck in getting this matter resolved.