****** of Data & Airtime

Firstly, I switched over to Vodacom thinking they would be better than another5 network and they aren't they are so expensive, but yesterday I need to have airtime and data on my phone due to work.... yesterday at about 23h00 I loaded R55.00 airtime on my phone that my friend got me because I didn't have cash to get .... I converted R29.00 airtime to 100mb of data and the remaining kept as airtime.... I downloaded two aps, one was approx. 32mb and the other was approx. 18mb.... this morning I went on facebook and instagram for approx. 20 minutes in total if even that, and everything was gone, my data and my airtime...<br> <br> I don't feel I should go and buy more data because that is just ridiculous, and I don't have money to keep buying airtime if Vodacom is robbing me , and I know if I phone Vodacom they are going to tell me there is nothing they can do ! so please advise me what I should do, because as a customer I don't think this is fair at all, I don't have the kind of money to just keep loading data and airtime every time Vodacom messes up ! and they mustn't even try and tell me I used that, because it is impossible, 1 gig normally can last me up to a month!