Telkom's disgusting service and attitude

In December 2020, a debit order bounced for my cell phone contract of R359 due to not changing banking details. I rectified this payment by making an EFT payment into the account. Middle February Telkom debits my account for R920.00. Today 26/02/2021 I receive a mail from them saying that my account is in arreras and my account has been suspended. Telkom is not even my primary service provider and I am having endless issues with them. They didnt even have the decency of calling or mailing me to advise how much they were debiting my account with and in the middle of the month they just decide to debit R900. I want someone from Telkom who is at a level where they can damn make a decision, to call me. I do not want this t be a debit order any longer!