Yes they can sue you and you can contest the amount due.

You can file a motion or an answer with or without a counterclaim. Consult with experienced debt collection defense attorneys.

Put your request for a refund in writing with a deadline and ask for a response in writing. If they fail to satisfy your request you can complain...

You can ask the attorney for back up documentation.

If the person lies, you can imitate contempt proceedings but it may not help get the money. You now need to use the information you have to...

Submit a motion to the court for a payment plan. Even if it is rejected it shows good faith.

Your particular situation needs to be evaluated by a bankruptcy specialist. A chapter 7 is what most individual would do. When to file bankruptcy...

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

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

Interest should be added to the date you submit the document. Additional filings can be made to add later incurred interest.