Vodacom extra services charges

Message: Vodacom has charged me for Content services and Vodafone Live for which I do not have a contract with them. Large amounts have been charged. I get no warnings about it. I only see this when I check my balances on my 3 contracts with them. It seems that they control which videos I watch etc. It even happens while using my Vodacom wifi modem. When I phone them the amounts are removed, but it happens all over again. I am canceling all my contracts with them in a few weeks time. Why are they not stopped!