Tried to use a cedar point gift card purchased at ...

Tried to use a cedar point gift card purchased at Giant eagle. Upon arrival was told gift card was invalid, it was only good for the year purchased. However, there was no date on the gift card to give you this information ( no expiration date). Was forced to purchase 2 more tickets to enter park. Please put expiration dates on your gift cards in the future as I drove 2 hours to be told my cards had expired!!