Vodacom can't provide me with my data balance

I have a data contract with Vodacom. <br> Over the last 4 months I have complained on several occasions that I cannot get a remaining balance on my data. <br> When I request a data balance it shows 0 data so I cannot accurately manage the data I have purchased.<br> Every time I complain I am told they know there is a problem and Vodacom are fixing it.<br> I would like to know WHEN????<br> I would also like to be refunded for data I could have used or carried over if I knew how much data I have/had available.<br> Vodacom, do you even care?