My screen does not show "chat" only "disable chat"
How to abort
I found the game you were talking about on your profile. Since it's part of a team match, it's impossible to abort and you need to resign if you don't want to play it, but if I were you, I'd play on and not let the team down.
Without checking closely, I signed up for a 14 day per move game. How can I abort it? No moves have been played yet.