User blog comment:Valentin 98/Urgent help!/@comment-4674838-20120623041025

Hi, if you have a problem with another user, you can email staff using Special:Contact.

That being said, if this person is an admin or bureaucrat on that wiki, and you're the only person who has a problem with them, I can tell you now that staff aren't going to intervene or do anything, they'll just offer you advice. Your best bet would be to choose another wiki to edit and avoid this person.

Staff cannot force anyone to behave nicely. They could remove his admin or bureaucrat rights, but to do that, you would need to have a community vote (not a poll or chat discussion, but a page with written opinions) with many people disapproving of him.