
Generally, if a person owes you money-especially for this amount ($5,000), your father should take your ex to Small Claims court where the maximum limit for individuals is now $10,000. He would be in court within about 45-60 days and get a judgment. If your ex believes you owe him money, he can sue you in Small claims as well. No parties are allowed an attorney in Small Claims. This is most likely the only way you will get this resolved.
This response is general in nature and should not be considered legal advise.