Airtime not recieved .. money Deducted

I bought airtime late at around 11pm on the 16th of April, the airtime never went through but my money was taken .. 400 rands. Now tell me how do I continue working while I have lost that cash.. now I'm forced to get more airtime, I did call customer care but no one is giving me a definite answer or cer*****y as to when my money will be paid back in my account.. this is so frustrating considering that it is an err on your system. I would expect better for a national bank getting the same complaints frequently but no improvement.. please fix this!!!