Employees eating customer orders

This evening my dad went to Debonairs @Tsakane mall, placed orders for two mini pizzas for my sons. The employee said the order will take 7 minutes, so my dad went to KFC to order more food. He took about 10 minutes at KFC, went back to Debonairs to collect the order. Only to find two of the employees eating the pizza my dad had ordered, they then told my dad to wait 5 more minutes;so they can prepare two other mini pizzas. My dad took his receipt and left the store, without the pizza and a refund for that matter. That is what I call horrible customer service and that is coming from someone who work with customers on a daily(me) , from 9-6. Now I'd like to know how this matter will be resolved, firstly my dad will need his money back and secondly the manager of that store needs to explain his employees behavior too. I'm very disappointed!