You can just get a glimpse of the rules for dresses in the linked video.
The first one reads "Only one inch of the midsection can be shown", and number five says "Proper undergarments must be worn". She admitted in the video that she was not wearing underwear. Also, I don't think she'd be able to cover her midsection sufficiently with her cape, based on what she showed that she attempted to do in the video.
The rules require a signature at the bottom, so she had to acknowledge that she read them. She chose not to follow them. Sorry, no refund; the money already went to the caterers.