Vodacom data disappearing monthly

Good day

For about the last 6 months I have been losing close to 1gig of data per month to streaming media. I have not signed up to any online product and have even sms'ed STOP to a given number and the data is still going off each month. This is **************** and i expect an valid explanation as well as reimbur*****t for the data this so-called service stole from me.

Thanks