unacceptable incompetence

I have recently upgraded my cellphone package to a Red Advantage package as it is my work phone and I need a lot of data and free airtime. Vodacom has phoned me a few times that they would like to add data to my contract because I pay too much for data. I have informed them that I have gone to Vodacom and upgraded in September for extra data. When I was at their offices I explained the whole data thing with them and told them I need enough data so I do not pay out of bundle rates. The girl explained to me that she recommends I take another 1GB data bundle per month to which I said yes. <br> A month after I upgraded I got a bill of about three times my normal bill. I investigated the bill and realised that the 1GB data was never loaded on my account. I contacted them after which they sent me the contract which states that I only signed for 1 GB data. As I understood that part of the contract that was just for the red Advantage contract and that the 1GB data would be added on top of it. They just ignore my requests to rectify the account retrospectively and claims it is my fault as I needed to read the contract in detail.<br> This episode cost my thousands of rands.