Take it over. Dismiss everyone, and dismiss the case.
That’s the short answer.
You do NOT ask the Magistrates or Judge whether or not they are on their Oath. If it is a Court de facto (i.e. a Court WITHOUT a Jury), then they are NOT on their Oaths.
So you turn it into a Court de jure by putting them on their Oaths. And, since there is no Jury convened, no de jure proceedings can take place.
Thus there are 2 possibilities:
1) They will not accept acting under their Oaths. In which case they will probably walk out (recusing themselves). If they do, then you take control, and declare the proceedings dismissed.
2) They will accept acting under their Oaths, in which case they are sworn to PROTECT & SERVE YOU … and thus their only possibility is to dismiss the proceedings themselves. (This has not happened to the best of my knowledge).
You can envisage the following scenario (my responses in italics):
“Call the next case!”
“Uh … it’s Miss Veronica Chapman, your Worships. Is Miss Chapman here?”
“No, Miss Chapman is a ghost … a fiction … a legal fiction … so she can’t possibly be here, and you cannot possibly proceed against a ghost, can you?”
“And just who are you?”
“Who’s asking?”
“I’m asking”
“And who are you?”
“I’m the Clerk of the Court”
“And what is your role?”
“I’m here to provide legal advice to their Worships”
“And just who is providing LAWFUL advice to these people?”
“Ah … I am”
“Then why do they need legal advice, when you can provide lawful advice?”
“I … ahh … are you Miss Chapman?”
“Well, firstly I’m not fictional, as you can see, and secondly I didn’t miss anything, did I? However, it appears that I’m the only Member of the Public around here, so I out-rank you because you are all Public Servants. Therefore I’m taking over these proceedings to start with.”
(Turn to the Magistrates or Judge)
“Under God, so help me God. That was your Oath. I accept your Oath and I acknowledge it. And I hold you to that Oath, and now we have a binding contract. You are sworn to serve and protect me, and I appointed you to your office, in these affairs, to uphold all my indefeasible Rights, and to protect me from the criminal conversion of the civil statutes of the State of England. Are you prepared to do that, or to recuse yourselves?”
They’ll walk out., and I will call “Case dismissed”, and tell the Clerk to write that down, or I will sack her from her job.