Fuck. Unstuck doesn't work.
VANILLA.CHEESECAKE WAS WRONG, VEXT. WRONG!
EDIT: After playing around in WarFrame for a little bit, I logged back into TERA to realise I could not move directly, but by running in a direction and jumping, I could "Fall" in the direction of a city. Finally got somewhere close to Tulufan, and used Unstuck and a Safe Haven Scroll. Neither worked. Ah well. Looks like I'm not playing TERA for a week, when support will likely read my message, lol and hopefully reset my character to somewhere in the game.