Vodacom and content services - and lack of any service

I have been a customer of Vodacom for the last 13 year. The billing from the company is getting more than pathetic. I see a charge for "content Services" in the bill. I have never subscribed to any content service and Vodacom customer care executive could not tell me which content i have been using to be charged. The issue will be raised, but she cannot reverse the charge...What kind of service, they could charge for random things and cannot reverse till they feel like. What a pitty....