Tickets can't be canceled. Refunds are subject to the organizer's refund policy and restrictions of national laws.
Generally speakings, laws obliges the organizer to return the money exclusively in the case that the event is canceled or if it suffers substantial changes, such as cancellation of an artist.
Returns are not accepted for reasons unrelated to the organization. If the refund is still accepted, the money may take up to 10 days to reach your bank account.
For all refunds caused by a cancellation of an event please write to firstname.lastname@example.org.