Upgraded data contract hidden costs

Good day.<br> <br> I have a 2GB PM data contract with Vodacom for the past 2years. When the 2GB data would become depleted it would not work due to no data available. About march this year (2015) the contract was eligible for an upgrade, so I logged into my account and done the upgrade for the same package as before (the 2GB per month for R109pm). This month I received my statement with a shocking R1956.10 bill! I immediately called the call center and a lady said to me that when my data would become depleted I would then be billed out of bundle rates. I was never explained this and the lady said I was supposed to read the terms and conditions.<br> <br> I am very dissatisfied with this and it doesn't even make sense to pay R109pm for 2GB data but if the bundle is depleted you would pay R1 per MB! (That's equivalent to R2000 for the same amount of data you would have on the bundle!)<br> <br> I would like for you (Vodacom) to please assist me in this regard. It is impossible for me to pay almost R2000 on this account for one month's use alone. I am willing to pay the bundle rate for the additional data used (Being about R139 for 2GB) which is more that fair.<br> <br> Thanks<br>