USELESS TELKOM

I visited the Telkom branch in Mall of Africa and notified them to cancel my month to month fibre contract at the end of November 22 and to cancel my debit order as I changed to another Bank. I have not received a reference number, as they informed me that they don't give reference numbers. I received the next bill mid November 22 indicating that I must pay for the debit order rejection although I paid the account manually. Nowhere it indicates that my contract will end at the end of November 22.