MTN - double debit order (*******)

Highly disgusted with MTN. They debited my normal amount on the 1st of February, all fine and well. Today you debit my account AGAIN with the same amount. Phoned the accounts department and you state that I missed a debit order in May 2020. Absolutely no correspondence about this apparent ‘missed debit order’ and back in 2020 my amount was R549 not the R1239 that they debited for today. The lady on the other side of the phone just says: “Sorry nothing can be done”. Sorry but that is not an answer. I have been with you for the past 13years but obviously customer loyalty means absolutely nothing to you. So next month you can just do exactly the same? Because you are a big corporate you think you can do and want as you please. Let’s see if you will be impressed if someone just debits your account as they wish. Let’s see if you can resolve this as fast as what you debited my account. Nothing more than a bunch of *******.