You should have linked to the exact page
You are not an admin there so you can't protect pages
The user you are having issues with is an admin so protecting the page won't help
It looks like one of the other admins blocked them. However, that won't really do anything since they are also a bureaucrat and can just unblock themselves. The admin in question wrote obscene things about you on their user page. On the flip side, the admin that blocked them left a rather rude and unhelpful note in the block summary.
My conclusion, just find another wiki. If this is how the admins on that wiki behave, it is likely just a matter of time before something causes all out war and you don't want to be caught in the middle of that.