关于圣托里尼到雅典的船票取票

我买了圣托里尼到雅典的夜船票01:23-08:00的
In order to get your tickets you will have to go to First Choice Travel at least 1 hour before your departure.The address of First Choice is:Street: 4 Astiggos Str, Karaiskaki Square (185 31 Pireas) - On the port of Piraeus, inside Gate E7.Tel: 0030 2104179444The opening hours are from 5:30 am until 22:00 pm , 7days/week (including Saturday & Sunday).Map: View Direction是只能在这一个地方取票么，可是我在圣岛诶，怎么跑到比雷埃夫斯港取票的～不懂了～求高手指点～