Originally Posted by irishguy28

... or if there is an Aegean transfer desk airside (which I doubt there is at IST) you can ask there.

You need to talk to A3, or to the agents directly responsible for handling that flight [I am guessing that A3 is handled by some other ground handling company at IST]; there is no point talking to any other airline, or anyone else that is not directly connected to turning your flight around.