I distrust the Imperials (Legion) and want to join the Stormcloaks – always have. However, I (accidentally) completed the first quest of Joining the Legion (“Clear out Fort Hraggstad”).
I then started the Season Unending quest line. I was able to talk Ulfric into joining the peace talks, but not General Tullius: as you may know, the only dialog option I have there now is to swear allegiance, which triggers the Jagged Crown (Imperials) quest.
However, according to the wiki (and other answers on the web), I should now be able to betray the Legion and give the crown the Ulfric but I am not given this dialog option. In fact, I am now in possession of the Jagged Crown and yet I cannot talk to Ulfric at all, I just get a stock phrase about coming to the council from him.
How do I enact the betrayal? How do I join the Stormcloaks?
I know that there are several, shall we say, complications with these missions. However, my particular situations doesn’t seem to be covered. I guess what I am looking for is confirmation for whether I really cannot join the Stormcloaks any more. I’d probably start all over then, which would be a shame (I really don’t want to join the Imperials, even though I’m a High Elf).
(I’m unfortunately on an Xbox 360 so I cannot install unofficial patches or use the console.)