Vodacom

I have a Problem with Vodacom, I took a contract sim-card deal with them on November of which the sim card is operational on the router. In the past two months I have been encountering extra costs of PURCHASED CONTENT of which I didn't subscribe for. I called in last month about these extra charges and we resolved the issue with the assintant , Now again this month they chipped in new subscriptions of which I have no knowledge of and funny part they deduct these subscription funds but they denie forming part with them.