Roman's Pizza acquirement problem. Disappointment City.

I am a teacher, I ordered pizzas as a treat for my class. I ordered the 2 for 1 special, x2. That's 4 pizzas. I only received 2. My class was so disappointed as I had to tear pieces of pizza in half. The delivery company gave me a coupon for the undelivered pizzas. But that didn't help my kids at the time. Today I decided to give the Roman's Pizza closest to me, and low and behold my order was rejected due to low stock. The money still came off of my account though. The pizzas are usually great, but getting them seems to be a problem.