I made a purchase for the pass to the greek islands and today i received a e-mail saying that the order has been shipped and our pass cover number to make the reservations.
I tried to do the seat reservations through the Hellenic seaways site and there is a box where you have to fill in your discount details and I give the pass numbers of our activated greek islands pass. However, when I get to the point when I want the payment to go through, a box flashes up saying that “The document number is not valid”, but i’m using the number they gave me in the e-mail
Who can I solve this?
