data usage - not explained

I am honestly sick and tired of Vodacom and the way they treat me as a customer. I have seen that they do not understand what is customer service firstly and secondly that they do not know how their data usage works. I recharged data and within 4 minutes over 750 mb was used. and I will be the first to admit that all I did was to upload a photo!!! and when I call the customer services department, I was informed that I must now press *11*245# which then requires internet for me to see what happened to my data!!! now where must I get the data and airtime to do that? must I then recharge again?? and for both my airtime to disappear for me to able to check this? why cant it be sent to me? is Vodacom just going to refer us and remove themselves from all responsibility?? that is unacceptable!!