In case an event is rescheduled, already purchased tickets and memberships remain valid on the newly scheduled date. If you are unable to attend the event on the new date, you can request a refund up until one day prior to the new event date via this form on Ticketmaster.nl. The amount paid for the tickets including service costs and memberships (if applicable) will be refunded to the bank account or credit card used for the purchase.
For more information about the ticket scheme 'Bewaar Je Ticket' (save your ticket) please see this page.