What a group.
While I can understand disappointment when "santa" did not show up, anger resulting in an "angry phone call" suggests a caffine (or worse) addiction to me.
The business owner was probably out money advertising the event, decorations, goodie bags for the kids, and maybe he footed the bill for the photographer. One can only imagine the parents who complained to him with their snotty nosed whining kids because Santa didn't show. I don't blame the owner at all.