If you're at the airport there aren't a lot of options. Unfortunately, their guarantee of food arriving in 15 minutes doesn't pan out. They also only offer cash refunds (odd, since you have to pre pay with a credit card). So, when your food doesn't arrive until your flight is boarding, you'll either get cash (at an international terminal! So it's useless) or nothing at all. Be ready to dispute the charges with your credit card.
Either bring food with you or pick something up from a kiosk.