Advice: What To Do, If Anything.....

Call the contractor and tell him you had to finish fixing it yourself, and that you believe he owes you something. Make sure you tell him you have no intention of defaulting on the $1600 loan, but if he could work something out with you, you'd appreciate it. After all, he and/or his guys dropped the ball and inconvenienced you and your family. Even if he only deletes $200 of your debt, that's better than a poke in the eye with a sharp stick. Be nice. You catch more flies with sugar than with vinegar.