Bought one of those 'sealed' $100 Coles Prepaid Mastercard. Didn't look tampered at all but when I opened it up, the actual card was missing. I suspect they carefully tampered with the bottom of the packaging, slipped out the card and replaced it with a piece of cardboard to make it look like a card was there.
Bloody miffed. Purchased with a debit so can't report a dispute. Will cop the loss but FYI to those who bank on these card due to these flybuys promotions, please carefully check the packaging. But dunno man, the bloody packaging looked legit.
Where did you buy it from? You may be able to do a chargeback on debit card too, ask your bank.