Beware of Vodacom's overseas data bundle

I have a Vodacom Red contract and I travel overseas about a month for about 10 days. I have roaming although very careful to keep my data roaming off as its expensive. I noticed on my account a large amount now of around R7,000.00 for an overseas roaming data bundel of 50 Mgs a day. I dont use the data not did I request the bundle but its a daily charge. When i call the call centre they do not even k ow what its for or how it works. Two different calls I got totally differtent ansers and they said they were unable to deactivate this which cannot be true. I have now had to totally switch my roaming off all of it in a desperate attempt to stop these charges. I am not even using their data