Vodacom - communication

I was getting a R400/500 deducted from my account and phoned. It was entertainment. The lady said she will cancel the prescription ( entertainment). Plus minus 2/3 months ago. I recently saw it is still being deducted. I phoned again and the lady said it must be stopped on the phone. Which nobody told me about last time. Costing me another 2/3 x R 400/500. This was not my fault because nobody told me this. What a joke. They are probably making money out of this.