MTN unauthorised debits

I received a debit check on my bank App from MTN mid February, of which I declined, I immediately called MTN, and I was advised to send them an Affidavit and copies of my IDs of which I did sent them to the MTN ***** team, but to my surprise R1000 was debited from my account on the 26th of February, I called MTN to get feedback on my ***** refence and I was told there's no update yet, again on the 25th of March another R1000 was debited from my account, when I call MTN again still there's no update, called again this morning still no feedback and the Lady that I spoke to promise to escalate the issue, and it means that the person that committed this identity ***** continue use MTN's service free, can this get resolve please.