Help! Nightmare Experience.

[Gregory Jimison]

Hired a contractor to complete hvac work. He said the work would be completed within 2/3 days and he is still not finished, it's been 19. Paid him for the materials of one unit (apartment building) and he did not even start until 7 days later. He did complete some other jobs that came along the way (shoddy work) 1 day total. Then 12 days in he asks me if I can buy some materials because a distributor won't sell to him. Finally 15 days in he has most of the work done (and has been fully compensated not to mention additional money on top of the agreed price per unit.) So now we are 19 days in and he still hasn't finished the first unit. We fired him and now he is threatening to call the city...I assume he didn't pull permits and sue use/put a lien on the property. Is this possible? This has cost us so much money due to the fact we cannot fill the units until he is done.