Reservation through Joolyea: To cancel or change your booking(s), please contact firstname.lastname@example.org.
Reservation through other booking sites: To cancel or change your booking(s), please contact the Booking Site directly. Booking Sites are responsible for reservations, hence they will deal with such requests. Most contact information can be found at the bottom of your booking confirmation. Alternatively, booking sites will have a contact page, where you will most likely find all the necessary contact details including phone numbers to the booking site’s support center.