Quest got bug

Dear GM, on Sunday I suffered a terrible problem. I was doing a quest and it got bugged and now I can't continue playing. The quest is "The battle for Undercity", is the last quest of a chain of them... Please, I need your help tos solve this problem. It doesn't matter if you cancel the chain of quest or just reset the event quest, I only need to get back to the normal world... Because it is like to be in another dimension... Please, I need your help.
Regards

Write an in-game ticket. They'll fix it for you, just don't re-take the quests, or this happens again.

Prepare to wait a day or two.