Mojo, the Dutch promotor says:
Bij verhindering kunnen bezoekers voor de oorspronkelijke datum zondag 30 juli de kaarten vanaf heden tot en met donderdag 20 juli terugbrengen bij de voorverkoopadresen van Ticket Service. De uiterste inlevertermijn voor het tweede concert wordt later bekend gemaakt.
This means:
If you cannot make it to the show on the new date, you can get a refund at all the official ticketservice selling points, which can be found here:
[
www.ticketmaster.nl]
The link is somewhere in the paragraph 'bestellen'. But you have tot do this before the 20th of june.
The last, confusing sentence is: 'later' we will inform you untill what date you can refund your tickets to the second show.
This indicates you can already get a refund for this second show, but THAT is not mentioned anywhere. But I suppose you can get a refund from now on for both shows.
Hope it helps you in any way...
Jelle