Possible ***** on my MTN account

Good day,<br> <br> On Saturday, 24 October my husband and I became aware of a possible ********** upgrade on one of the contracts in my name. I don't want to list any of the account details here but I sent a detailed email to MTN's ***** department AFTER trying the number I was given by the call centre. When I called their so called ***** department I was told that it was for MTN staff only. When I called the call centre again they said that it was the only number available but that I should send a mail to their ***** department, which I did. I sent the email on the 27th of October and they have yet to respond to my email. The email contained a timeline of events as well as screenshots of sms's received confirming that an upgrade was approved which I never consented to or signed for. I need someone from MTN to get in touch with me so that this matter can be investigated. This \upgrade"resulted in massive data charges which I am now obviously going to dispute. I have tried to call as well as email but with no results whatsoever."""