Never ever cancel a shop without trying to contact the scheduler first. Most of the time, you will hear back from someone quickly and they will be able to work something out. ie: changing of the date/time, changing the type of shop it is. Not all states are the same, so it's hard to know who is doing what in which states. I'm sure that if you would have contacted them ahead of canceling, then you would have had a resolution without canceling. Also, when you have a question about guidelines such as reservations, ask them. Companies would much rather you ask questions, request an extension..anything other than cancelling a shop.
I'm glad this worked out for you ok this time, but as others have said, MF has a history of releasing shoppers for no good reason, I wouldn't give them a good reason.
Shopping the South Jersey Shore