When you expect an email, always check your spam folder. If you applied, the event organizers will need to find time to accept or decline your application. Please bear with them… If you applied to a private event by invitation only, you may not receive a response since this event does not accept public requests.
Some events will only allow admission a few hours before they begin. Before contacting the event organizer, you can seek assistance on the events discourse forum page here, where you can also monitor the status of applications.