Biggest ******* of All

Tonight I tried update my PS3 software through Wifi which should have 2GB of data on it...the update is 964mb thus leaving another 1.03GB left. half way through the download the system gives an error and say im not connected to a network. Check the balance on the sim and guess what the balance is 0.02mb now either I suck at maths as how can 2GB be gone when I only tried to use 964mb? Obviously Vodacom is *****ing mb's. This is not the first time I have noticed it either last month the same thing happened. But I could not remember if I had used any data before so I left it as I could not say beyond a reasonable doubt that I had 2GB available. Today I made sure I had 2GB available before I attemted the download. This complaint would probably not do much I just want to tell everybody that has Vodacom Wifi or are considering in getting it spare yourself alot of frustration and go to another network provider as Vodacom will rob you of all your data before you can say *****.... Im not renewing my wifi contract with vodacom and I will be taking my business elswhere where I get a better deal and I wont be ****** of my data.