Charged bogus subscription for content service that I don't know on my Cell C contract account

I have been charged R45.00 on top of my R99.00 monthly data contract since August 2017. I am also going to be charged on the September invoice payment as per the statement. And it also looks like i will be charged this bogus fee on my October bill as it is already appearing as "spent" on the Cell C app.

Initially I thought I was just hitting the cap on my 5GB anytime plus 15GB night surfer but realized when I saw the same amount to be charged on the September bill. I contacted Cell C via the app (06/09/2017) message and when they got back to me the following day (07/09/2017) they told me about the content subscription story. I demanded that they pay back or reduce my future installments with the fees already incorrectly charges since I did not subscribe to any content. They promised to come back to me with the resolution within 72 hours, however no one came back to me up to so far.

I even asked the person who called me how I got to subscribe to these content services as the sim card in question is always on a router (device). I don't even have USSD access on it that will enable me to subscribe to things. If the subscription was not done via USSD, does it mean it was done via the Internet? if so how did i get to successfully subscribe since i don't even know the router's cell number. If it was not through entering of the cell number to subscribe, are they telling me that there are websites that are "landmines" for content services such that when you browse or redirected to them you have automatically subscribed to them? if so why is Cell C collecting monies on behalf of these bogus content service providers from its valued clients without their contents?

To put things into perspective, is it possible that a client can be on a R99.00 deal and subscribe for contents that is more than half the cost of the host contract price.

For the record the person that called me from Cell C can't even cell me what is the content service that I have subscribed for or the company responsible that Cell C is paying over my money after deducting it.