Certain actions can be crimes or civil wrongs, or both. You report crimes to the police. For civil wrongs, lawsuits are filed.

You owe the money and should pay. He may or may not demand payment. If you fail to pay he could sue.

Sometimes additional work could be required after a final bill.

Usually, but not always, a written fee agreement is used.

It looks as if you need to consult with other attorneys to see about taking over the case if your attorney does not respond to you.

Look into filing a claim of exemption or bankruptcy.

If they are past your state’s statute of limitations you have a defense to a lawsuit.

An attorney demand letter may be the next step, followed by a lawsuit.

Yes. They are in breach of contract.

If you are subpoenaed, you must appear or make other arrangements. Contact the DA to discuss the issues.