If you ended up in Mordion Gaol then SE has determined you to have potentially violated the Terms of Service - according to this page, your current situation is probably a Warning or Temporary Account Suspension (if it's a Warning from what I understand a GM is supposed to appear and inform you of what the violation was and not to do it again or do something in a different way in the future, and once you agree you were meant to be released back to the aetheryte you set for Return, however the GMs might be just busy and considered your case low in priority, hence why one hasn't shown up yet. Unfortunately there isn't anything that can be done except to wait.

The other possible cause is you have had a Temporary Account Suspension placed on you, but I thought that locked access to your entire account for the period of the penalty and didn't just send your character to Mordion. Either way, all you can do is wait I'm sorry to say.