Unauthorized *****ulent Content Service Subscriptions

I've recently been getting sms's stating that I have subscribed to a slcontent service and will be charged a daily amount towards my Vodacom account. I have NEVER subscribe ld to these slimy and over priced services. I never received a prompt asking me to subscribe at all, I just received an sms stating that my subscription was successful. Content subscriptions are blocked, yet this block is bypassed and I am subscribed anyway. I called 2 Vodacom customer service agents and they were not able to explain as to how I was subscribed without my permission and they just cancelled the subscription.

However, I received sms's from said cancelled services stating that I have insufficient airtime to for the service, how is it I am getting this sort of sms but the service was canceled abd blocked?

How is it that these unauthorized content services are bypassing Vodacom security protocols? Had I not seen the sms on time and canceled them, I would have been unknowingly charged for something I never authorized.