I Want to buy data

Ok so i just got of the phone now for the third time with customer care and I cant seem to get a definitive answer with regards to the cost of buying data for my data contract number ***.<br> Last month when my data ran out I used my vodacom app to buy additional data normally the 1 Gb for R79(I have done so for a couple of months), now from what I understand and how they explained it to me that was only for a promotion and its no longer available , so ok I understand but had a look on the internet on this page [URL Removed] , at the bottom where its written \<br> Once-off bundles for data price plans on Contract and Top Up \" it says that for one Gb of data its R85 ?<br> <br> Can someone at vodacom please explain to me why I am not allowed to buy additional data at those rates since im already a contract holder and have been for a couple of years .The customer care line explained to me 3 times that regardless if your a voice data or smart package contract holder that the data rates remain the same, Is this correct?"