How do I leave a game if the creator never shows up?

How do I leave a game if the creator never shows up?

If the game didn't start yet, you still have time to press the red cross at the beginning of the line.

If the game began, you have to wait the time out (by default 30 days, otherwise it's written at the end of the line, black number on white background) to be able to ask for a replacement or (3 days later) delete the game.

So I guess I'm lucky that the time is only 12 hours per move then. The issue is that after I joined the game, I saw that the creator had not been online since June 17th. I'm new, so I did not know I could not leave if he was not going to be available.