I too was scammed on this. Their phone number is 800-948-8488 if you want to complain but it doesn't do much good.
I was told they would submit a complaint form to their marketing dept. No guarantee I would get what Am Entitled to. I've attached a snap shot of my confirmation showing I would get emailed and code for the pizza but did not. Spoke to a guy named Patrick and he kept apologizing but unable to do anything else.
apparently it was not valid for pick up but this is the first I've heard of this. I will never go to Pizza Hut again.
Review about: Pizza Hut Pizza.
Reason of review: Poor customer service.
Monetary Loss: $15.
Preferred solution: Deliver product or service ordered.