Edgars Gift Card of R500! not working

I bought an Edgars gift card through FNB eBucks, they receive cards preloaded and post it out. I first attempted using it at Edgars Bedford Centre, thinking there was R500 on it, at the till, the teller told me that it was reflecting a zero balance. They tried calling the Edgars gift card department at Edcon and could not get through and were put on hold for a long time, eventually I paid for the clothes cash and had to leave. I later called eBucks to query this, they told me to go back to the store and use the card as it has been activated and if it still reflects a zero balance then the Edgars teller should call the the gift card department and speak to a lady called Karen Smith. I go to Edgars Eastgate this time, to which they tell me it still reflects zero, I give them the number to call and the ladies name, they can't get hold of her and the information they have is that there was only R170 on the card that was used at bedford centre, to which I rep**** that was goods I bought for cash when the card did not work. It has been an absolute waste of my time having to sort this out, having read past posts, this seems to be a common problem with these gift cards! Pathetic Service