Vodabucks system crash

I was buying two food vouchers using Vodabucks, the transaction failed before the notification to pay the portion of money on my bank but they had already taken 200 Vodabuck. Mind you, I have 118 Vodabucks expiring today. I call the Vodabucks department and they tell me that my Vodabucks will bounce back on the 27th, but the ones that are going to expire will expire from those ones that will bounce back on the 27th.

How does that make sense? It wasn't my fault that their system crashed! Also, it would make sense for the 118 to expire from the ones I have currently, or they automatically change the expiration date to after they bounce back, so that I can use them before they expire!! Vodacom will keep losing clients over small things.