MTN ***** Department not responding

I logged a call about *****ulent numbers added to my account on 1 October 2023 by phone (ref ***). These numbers were added without any consent from myself or any notification. I received my account and it was astronomically high. This is still not resolved. MTN have suspended all outgoing calls from my phone as I refuse to pay for calls from numbers that I've never even added to my account or consented to. I have asked repeatedly for feedback by phone and email, and in the meantime, that account is going up more every day. I am a pensioner and the account is already over R12 000. It shouldn't be necessary to pay for someone else's ***** considering it must have been an inside job. How else could these 3 contracts be added to my account on the same day at the same branch in Johannesburg without me even being present or signing off on it. It's ridiculous that I'm not getting any feedback and my account is suspended.