If you are useless once, you should get a refund. It's a big deal to make a discount. But adults should think carefully and don't spend impulsively, because it is their choice after all. Besides, there may be a no-refund policy in other people's stores, and it was sold during the event. It means that you occupy a position in the activity. If you buy someone else, buy one less, and then return it. Others will definitely be reluctant to negotiate with the store or transfer her. Otherwise, they should call the consumers' association and ask if this situation can be refunded.