Do you mean that Hellenic Bank "being closed right now" they don't have a 24/7 emergency fraud team to report card loss/theft, possible phishers hacking your account, or (even worse) scumbags from Russia, China, Nigeria ét al having
hacked the Hellenic Bank IT systems?
If so, that is so incredibly naiive of them as to be totally unbelievable in this day and age of Cyber Crime...
Hope you get it sorted in the morning (when they open, IF they open...) - AL

Gone but not forgotten...