FAILURE TO SEND PAID UP LETTER

During November 2016 we cancelled a phone line. The final invoices was sent and paid in December 2016. For reasons unknown to us Telkom never cancelled the line as per the written instruction sent to their cancellations email address in November 2016. Telkom then proceeded to list me with ITC for an amount of R 2 000. Having disputed this the amount outstanding was confirmed as being R 166 which was paid in full. We now need a letter to confirm that the amount has been cleared (as this was Telkom's failure to act according to their own service levels). Their credit department is now just ignoring this request for their own call centre.