Telkom and Absa compaint

I cancelled my fibre line and received written confirmation on 14 Nov 2020 that it was cancelled. However, a debit order of more than R1800 was deducted monthly from my bank account. Every month my banker requested the amount to be reversed. I was at Telkom many many times, and they confirmed there is 4cent outstanding. However, in August an emplyee at Absa refused to reverse the amount. She did not even know the full story. Telkom received money which was not neant for them. The Telkom client service informed me it might not even be from them as I do not owe them money. Im furious for both Absa and Telkom. This is unacceptable. Sadiyah Vallee at Absa tried her best to reverse but the person higher up refused!!!