For the people from other countries that are not listed, just change the country when you’re filling the information. I am also from Greece and bought the game last night using paysafecard by changing my country from Greece to France(which is listed). It may give a message that the address you are using was not found but there’s a button to move on without changing it. From what i understand you only need to use a country for the buying part, i can’t find an option on my account that says i’m from France or anything. So just try this and see what happens