If you settle a case, you cannot appeal................

I agree. It is your decision what to do. If she threatens you, call the cops.

This is a Q&A site. You have not asked a question.

File an answer denying all the claims. go to Court. Otherwise they win by default. Or just pay them what they are owed.

Google Underage teen girl scam. Then block all communication with them.

There is never a requirement to read you your rights. People watch too much Law and Order.

The way you sue anyone is to hire a lawyer to do all the research and, if you have a viable claim, to file suit.

You literally answered your own question with the information you provided us.

As noted, the first thing you do is see a doctor. If you aren't injured, you have no case.

Your prolonging things is only making the plaintiff's lawyer more money. Try to resolve this, or hire your own lawyer to defend you.