It may be a scam. Whenever one is unsure, give no information, demand proof in writing (do not give your address or other information),...

You must respond in the legal way and on time with, for example a motion or an answer with affirmative defenses. Failure to do so could...

Put your demand for proof of debt, debt ownership, and payments in writing to them both.

They cannot successfully garnish SS. If they levy the bank account, file a claim of exemption. You must respond in the legal way and on time...

Due to the large amount of money in issue, it would be wise to hire an attorney.

Legal aid offices often have clinics where you can consult with bankruptcy attorneys. Many cities or counties have legal aid or other...

You can proceed against the judgment debtor. There are many tools and techniques of judgment collection, including debtor examinations, written...

To consult with attorneys use the Avvo search tool to find an attorney. https://www.avvo.com/find-a-lawyer

Have the documents reviewed by an attorney. The military have legal offices that can assist.

You are likely judgment proof at this point. The vehicle is unlikely to be levied.