GiftRocket  - empty card

I have purchased a $50 worth gift card from www.giftrocket.com website and gave it to a friend of mine as a birthday present.
When my friend wanted to use the card he was told that it was empty.
When I found out about that I immediately contacted GiftRocket customer support service and asked for help.
Their rep said they'll find out what was going on and promised they'll contact me back as soon as possible, but that never happened.