Vodacom worsts service

I noticed that every time at this time of the month I get messages on my cellphone saying that I am subscribed to blackberry internet services, and as result of that my data and airtime just disappeared overnight. I went onto My Account Summary on Vodacom and it shows clearly that I have BIS Services still on there which I took off two years ago. I called 111 Customer Care to inquire and they said they cannot help me and that I was on the internet last night, but I as asleep. My phone is permanently on WIFI and as far as I am concerned, that shouldn't influence my phone balances. I was dealing with rudeness and people who aren't trained to do this job so I would love if someone that knows what they are doing can assist me.