Over billed

I've been paying R95 from the time I've taken out a contract with vodacom and now all of a sudden that changes. Last month I was billed 395 and I called customer service to inquire what has changed on my account, I was then informed that I'm on a out of bundle and I've asked them to cancel that and assured that I'll be paying 95 as I was before. This month, today to be exact I've been billed R2703 and I called AGAIN!!! GUESS WHAT IT'S ON THE ****** DAMN out of bundle that I didn't sign up for