******** Debiting of my Bank Account by TelkomSA

I took out a 24 month data contract from TelkomSA. The contract run period was for 14/02/2017 until 13/02/2019. The contract run period did lapse but TelkomSA continued to debit my account until this day. Their mobile data simcard was disconnected and chewed up the morning of the 14/02/2019. Therefore I have never received, used or benefited in any services or benefits from TelkomSA since 13/02/2019 midnight. Their continual debiting of my account is ******** as it is not sanctioned by any contract obligation entered into between myself and TelkomSA nor does it flow from any services or benefits that I received from TelkomSA. What I want is for TelkomSA to: 1. Stop debiting my bank account with immediate effect. 2. To return all the monies they have been ********ly debiting from my account as from 15/02/2019 until this day.