I noticed in the screenshots from where the event popup and disconnect popup are shown, to the one where the disconnect box is moved, the view is different. It appears you were able to rotate the camera. Can your character stay online long enough to rotate the camera a bit? Especially now that the event is over, how long can you stay online with her?
If you can't stay on long enough to activate a return scroll, perhaps you can be on long enough to put on a trade flag, summon a transport, dismount it, and mount it. (maybe getting kicked offline between each step). That should allow your character to move a little and doesn't have the 30 second timeout a return scroll does.
I didn't notice your server, but if you're on venice I'd be willing to exchange you a trade flag and transport if you can stay on for a few seconds at a time. Just hopefully there's not something else disconnecting you besides being stuck

Missing the good times in SRO... 
SRO:
1x, STR Blader (Thebes)
54, STR blader (Venice)
0x, INT wizard (Venice)
19, INT spear (Venice)
34, STR rogue/bard (Venus)
0x, STR blader (Venus)
8x, INT bard/cleric (Gaia)