Possibly. The court can either order it to arbitration or, for convenience, allow it to go forward in court.

Check the court records online. Even where service was not proper it is not wise to ignore the case.

Look on the Court’s website too see the forms they have and their court rules.

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

That is a lousy situation to be in-everyone blaming the other person. Look into class actions brought against the service provider.

Your bank cannot accept instructions from you if they have a lawful order. You need to file to have the orders removed.

When a POA is rejected, we find, where possible, to use their own form POA

It may be too late to sue. Have an attorney review the agreement and offer.

You can request this in discovery, for example interrogatories and requests for production.

It is possible. Have all the facts reviewed by an attorney for your best line of action.