MAGICAL UNWANTED OUT OF BUNDLE DATA ON MY PREPAID PHONE

I AM MOST UPSET AS I SEE THAT VODACOM HAS GONE AHEAD AND BILLED ME ON A PRE-PAID LINE FOR OUT OF BUNDLE USE. SINCE WHEN DO PRE-PAID USERS GET OUT OF BUNDLE DATA TO USE? WHY WAS I NEVER ASKED IF I WANT THIS OPTION BECAUSE NOW ALL YOU DOING IS RIPPING ME OFF OF AIRTIME I PUT ON MY PHONE CLAIMING I USED OUT OF BUNDLE DATA THAT I DIDNT ASK FOR NOR AGREE TO!!!!!!!!!!!!!!!!

YOU HAVE USED R50.31 OUT OF BUNDLE DATA ON 060******* SO FAR THIS MONTH? WHAT ON EARTH IS THIS VODACOM SINCE WHEN AND WHY U CANT CHARGE ME FOR OUT OF BUNDLES I HAVENT AGREED TO !!