If you are not informed before swiping your card, that is to say, your contract does not say that you must open the card in April, or you have negotiated other card opening times or rules in writing, you can complain to them, but the complaint effect may not be good, and it will offend people. If you can't go to the gym in April, you can discuss whether you can apply for an extension. Generally, fitness cards have a free extension service for a certain period of time a year.