If for any reason you need to a cancel an event, select the published event in the events tab and scroll to the bottom. If you choose delete the following message will appear:
Before selecting okay please ensure you have contacted anyone who has purchased a ticket or offer for your event. They have a right to know under consumer law that you are cancelling an event. Please see our terms and conditions for more information. Once you have informed customers click okay and all attendees will be refunded automatically.