Cell C Ripping Us Off

I am a very unhappy Cell C customer how do i recharge with 1GB of data and R150 airtime but everything disappears in minutes. This is not the first time i am lodging this complain but all i get is \No mam there is nothing we can do for since its your internet\". How does a service provider not know what websites are finishing our money. i am really starting to think that Cell C is wanting to catch up with other network providers that is why they are reaping us of. This morning 11:12am i bought data for 1GB 12:21pm it was all gone. I do not download anything hardly use internet on the phone as i have at work. all updates i do at work with wi-fi now what is it that is killing my pocket? my friend has the very same problem. this really needs to be looked we are being riped off here. Cell C will never ever reach the standards of Voda and MTN if they carry on like this. i demand every sent of my money spent this because all i do is recharge for my money to disappear. i am so annoyed i dont know what to do anymore."