Airtime/ Data eating Monster

I bought R50 airtime yesterday morning. This afternoon around 4pm I had R2 left. I made no outgoing calls all day. I still had some data left. I called your support center only to end up with Tobi. When I selected the "chat to human being" option I then had 4 calls...4 DEAD AIR calls. Please understand that I'm quiet peeved off right now because airtime and data are not exactly cheap especially when bought with my last cents. I've also noticed since last week that my data also disappears on Saturday I bought 250 megs of data depleted by Sunday . All I'm asking here is what is going on and most importantly can I get my airtime refunded back!!