Robbing customers and Incompetency of Telkom

I am frustrated with the incompetence of Telkom and I should take necessary steps to sue them for the breach of contract. Telkom has suspended our account because apparently it has not been paid for this the account is in arrears, yet they have been deducting up until 25 February 2021. When calling them they seem to not know the error told us to send stuff showing the deduction of the bank statement which was done still no success, today went to the store and the lady had the nerve to say we must pay the outstanding amount and email it through regardless of the fact that we told her that they have never missed a debit. Really really disappointing service.