Please use the submission page here to submit your results:
http://eso-community.net/submit_match_results.php
It should autopopulate with options to select which of your group stage opponents you are facing, who won, and the score. You also need to attach the files with that interface. It will create a post for you and submit the game data to the tournament database for updating standings.
Thanks. Let me know if it doesn't work for you.