This contractor refuses to complete the contract

As a "good faith" gesture I sent an additional 20%

A letter was sent back stating they will do no additional work without full payment plus
additional funds. I then cancelled the good faith payment. They decided to contact a
collection company stating I will not pay.

I will gladly pay the full amount, per the contract, when all contracted items are
completed. Including the most difficult part, balancing the hood (see video)

Do you want to deal with someone like this?

Credit Agency Involved