Airtime *******

I wish I knew??!! I had received R120 airtime on Saturday afternoon and had purchased a BIS bundle(uncapped). Yesterday(Tuesday) afternoon I had checked my balance and had R60 available, this afternoon I needed to make an urget call but to my detriment I found my balance was NULL!! I did not receive any type of notification for a \deduction"of any sort! If it was some sort of a **** should the service provider not warn me before hand? On top of this I am totally disgusted with customer service who told me that their systems @ 16:00 is still not updated and I should call back? None of this is fault of mine and I demand a refund! How can they been so incompitent? I am strongly considering on changing my service provider. """