Telkom Mobile ******** Debits/Attempted Debits

I have been ********ly debited by Telkom Mobile on 27th Feb 2021 R358.00 *** 15th Mar 2021 R617.00 *** 14th May 2021 R1337.70 *** These debits my Bank successfully reversed them as I Did Not Authorise it. Now in June 2021, On the 15th and 18th Telkom again tries to debit My account for R1596.70 and they were unsuccessful as my account had insufficient funds. ***. If my account had funds then I would have to reverse these transactions with my Bank again. The Reference Number is the Same in all debits or attempted debits. I am a Telkom Mobile Customer for their LTE Internet which I signed for and my debit order goes through successfully on the 30th of each month, but there's someone at Telkom that's trying to debit my account ********ly. This is very annoying coming from Telkom, I will definitely not support them in the future and To the other customers, please check your monthly debit orders!.