POOR SERVICE WHEN TRYING TO CANCEL A LINE

POOR SERVICE from Telkom when trying to cancel our fax line. We completed an application online on 28/10/2019 for the line to be cancelled effective 31/12/2019 (2 months ahead as per their request). We are in March and our account is still being debited. They keep confirming that the line was cancelled on 20/01/2020 and we need to give 1 month notice, therefor we are being billed until 20/02/2020. This is NOT CORRECT as we already submitted a cancellation on 28/10/2019. Why should we AS CLIENTS pay until February 2020 if Telkom processed the request late only on 20/01/2020. Our bank account has been debited on 27/01/2020, 27/02/2020 and now again on 27/03/220. This is absolute terrible services from such a big company in South Africa. I will never make use of Telkom again or recommend them to anyone.