Subscription fees

Today I bought airtime for R20 using bank app and when I tried to convert it to data it says insufficient balance and when I check I have R9 balance and I never borrowed any airtime. When I called the customer care they told me about subscription of ONMO for R5 daily that was sent to me and was automatically accepted by MTN without my permission. It's clear now that the mobile network are de*****ing us customers with these subscriptions because they know very well we Wil not respond to them. I was told buy Nomfundo (call center agent)MTN can not refund me for that. I am really so disappointed with MTN a big company like that to de***** customers like that believe that I'm not the only one who had experience this.