Daylight ******* on unwanted bundle apps popping up

I had an exorbitant statement this month, where Vodacom charged me for data I had apparently authorised through self-searching. When I called, I did have a very friendly person help me, but he was unable to reverse the charges, as apparently I had already used the data, and these were automatically refilled every time I ran out. I do not search for data bundles, but vaguely remember a link popping up, which I tried to close, but apparently during that process of closing this link, I was charged over R500. This is daylight *******.