No help on *****

I've had the same number for almost 20 years and never had issues with MTN. However I'm waiting from the 1st of April 2021 for them to get back to me regarding a ********** number that was miraculously registered on my account as the main number where they deducted R4500 for DATA bundles which I have never signed up for or give permission to someone else to buy. I've probably spoken to 4 or 5 so called MTN champions and every time it's a different story because they are probably not properly trained. Every time I ask to speak to a manager or someone in a higher position, nobody is available. I've been trying to get feedback for more than 2 months now. Money has been ****** out of my account and I don't know why it takes so long just to trace the agent and manager who gave permission for this transaction. I need help PLEASE!