MTN allows ********** account to be opened in company name and deducts debits in excess of R36k!

MTN somehow allowed a ********** account (connected to nine mobile numbers) to be opened in my company's name during July 2019. As a result, wrongful debits in excess of R16k were deducted from my business bank account. However,I only became aware of this on 01 October 2019, immediately informed MTN of said ********** account, requested for the account to be cancelled with immediate effect (Letterhead) and it was confirmed by MTN that the account had been successfully suspended. I also asked their ***** department for a clear explanation as to how this happened, seeing that upon opening of such an account, one needs to present legal docs such as bank account confirmation, business registration etc. Unfortunately, the following month another wrongful debit was deducted in excess of R20k and I realised the account was never suspended. (Even though MTN confirmed this) Also, I've been trying to get a hold of MTN's ***** department but have had no luck. (It's been more than a month ago since I've logged first complaint) The only feedback I've received was from four different representatives confirming that the matter has been escalated with the ***** department. This entire matter is still so surreal to me as I can't fathom how a company can still be operative with such incapable people and systems in place?