DATA Cancellation and still getting Debited

I have a contract with Telkom, so I called up to find out about my statements and also to confirm payments that were debited. I spoke to a consultant and discovered that I was still paying for data to the value of R59 a month which was cancelled in the month of September 2021. The consultant confirmed the month to month cancellation and advised if i want to still keep the number on prepaid, i agreed to keep number on prepaid. I did make numerous calls with reference numbers but not yet received any calls from Telkom. I would like to be paid whatever was not supposed to be debited incorrectly! How can you remove monies from my account without any service provided? An Urgent response will be highly appreciated, I will be moving away from this network including my family members because i feel we are not going to be sure or safe without continuously checking how Telkom staff does there job.