Yup, I can't always jump in game, but Bubbles often can so long as the Munch is otherwise occupied. Should all else fail, though, you absolutely can document what happened and post in "Request Bans." It shouldn't matter that you're an admin. Simply asking for polite behavior should result in a proper response.
If it doesn't, or if that person is so unpleasant as to not respect any clan representative, we probably don't want them on our servers, at least until they read and agree to our rules. Request bans will do that, and also demonstrate that you have power, even if you're "only" an =(e)=. They don't seem to understand we value and act on any incident reported by any of our clan mates, but that can be fixed by your reporting them.
We're here for you one way or another. Oh, and on the broken mic, you can hop into vent, and use the chat function to let them know "I need help on [insert server name]." They'll come.