I am receiving MTN Client Invoices / Statements / Use reports. I am not an MTN Client.

I am not an MTN Customer. I never have been. I am, however, receiving Invoices, Usage reports, Statements and Bills for one of MTN's clients- to my email address. I have sent MULTIPLE emails to MTN Customer Care over the last 12 months, to have this rectified. Since the documents are encrypted with the Clients' details- I can not simply call the customer directly to ask them to correct their email address with MTN. I have received many reference numbers to my emails: - REQ*** - support team back end support - Reference Number: *** - Reference Number: *** - Reference Number: *** - reference number is *** - ***** division - reference number is *** - ***** Division - reference number SR # *** - Billing Team - reference number #*** - Enterprise Support These reference numbers for 2021 only. I have more from 2020. I can not go into an MTN Store to rectify this- I am not in South Africa. Please- can someone from a very senior systems' support office contact me to resolve this.