MTN took my airtime

I’m so ****ed with MTN! I recently started using this network last month. I ran out of my 100GB 30days data yesterday and today I tried purchasing airtime to buy data since I had ran out. Only for my airtime to be deducted after recharging TWICE! When I contacted them they told me I had a subscription that was taking R39 and to my surprise I never subscribed to any of those things, the agent I was communicating to also wasn’t helpful when I tried finding out more on when I subscribed to this subscription. The only thing she was focus on was that I should move on cause the subscription has nothing to do with them since it’s a 3rd party thing, which I don’t believe cause I never subscribed to any of that. And also last month when I started using this SIM card I never experienced such until today. I really want my airtime back because if feels like I was ****med by this network.