***** unto my account

I have a smart package contract with Vodacom. My package normal cost R350. The last two months my bill at Vodacom was over R700. I concentrate not to use all my data and 90% of the day I'm on WiFi. I contacted Vodacom today to find out why my bill was so high. They told me is BECAUSE of content services. I subscribe to 5 content services and each of them cost R7 a day. I told the lady I never subscribe to such stuff. So she cancelled it to me. I have the proof of it all and I feel this is *****. What am I suppose to do? Somebody subscribe unto my name for this contents. I did not and had to pay the extra money. I am very unhappy.