For a wage garnishment, the employer must be served. If investigation does not turn up the employer, you can do a judgement debtor examination.

Depending on the language in the order, it may be a judgment on which you can now collect.

See an attorney for a proper demand. A failure to refund may give you a lawsuit. Consult with experienced collection defense attorneys.

Look at the court filings and Consult with experienced attorneys.

There are ways to recover e-mail. Look into the methods. You can also subpoena the email provider or those others who received the email.

Consult with experienced attorneys. Use the Avvo search tool to find an attorney. https://www.avvo.com/find-a-lawyer

These threats are a violation of law and a signal this may be fraud.

Contact a skilled debt collection defense attorney.

Not necessarily; it depends on what other evidence there may be and decisions of the prosecutor.

Probably yes. But discuss this with your attorney.