*****! Terrible customer service

To whom it may concern. I have been a loyal customer to MTN for all these years and I haven't had any issues. I am now disgusted at the service as I received a call to upgrade my contract to the same plan but I will be paying R149 a month. I then agreed to that however my account was debited with an amount of R1167, which I was unaware of, I have tried emailing your customer service, I have also called and still haven't received a call back or any feedback with regards to my money however I have received feedback that the upgrade was canceled. So I need to understand why hasn't my money been refunded to my account. I also checked my mtn app and I will be billed this month again yet I haven't received my money for the previous month. If I don't hear from MTN within the next 48hours I will be publishing this as this is now ***** and I will also put it on every social media. This service has gotten ridiculous, MTN used to be one of the best network. I want my money back and reverse immediately.