It is possible to change a type of your pass as long as it is a similar type or an upgrade to your previous purchase.
In order to proceed with the exchange you need to notify that to the organizer (email@example.com) and make a surcharge which is the current difference of the prices between the two passes, according to the festival’s pricing table.
The payment should be paid according to instructions received.
In case of a change to a cheaper pass there are no refunds of the difference between prices.
An upgraded pass is not subject to 14-days return policy.