To buy your tickets in .pdf form either cash or card you can contact the following retail spots:
Syntagma (Mitropoleos 25), Opening Hours: Weekdays and Weekends from 08:00 to 23:30
Kolonaki (Tsakalof 14), Opening Hours: Weekdays and Weekends from 08:00 to 23:30
The Mall Athens (Level 0), Opening Hours: Weekdays and Saturdays from 09:00 to 22:00 (Sundays closed)
Designer Outlet (Ground), Spata
* For your purchases you are charged extra per ticket with a service fee for the sale of tickets.