Vodacom Not Accountable

I have noted content services being charged on my account, i have asked on 3 or 4 occasions for a blocker to be placed on my account to stop these charges, however, each month another R100-130 is billed. Last week i logged a fourth call and was advised that the technical systems people would call me to advise when the billing started again and how, this has not happened. When i call customer service last week and today all i hear is that there is high call volumes and i should call back. I feel that as a service provider Vodacom should pay for these costs if there system does not work correctly.