I called the company and it turns out they processed the order but never sent it. Within the hour they had shipped it priority mail. I should get it on Monday.
I was impressed with the prompt action on their own dime, and I emailed to tell them so.
Turns out I won't be going to the party tomorrow anyway--my sickness came back, and my daughter is the queen of germophobes. I would certainly be persona non grata!