Carroll Country Construction and Exteriors Inc. review: construction contractor 1

We hired Carroll County Construction and Exteriors---Nick Laganas---(Ossipee, Wolfeboro NH) to re-side our home on Feb.1, 2017 after they came and spent a good amount of time looking at our house and submitted a detailed contract.
They finally started the job about 10 days ago. After only a few days on the job, the owner demanded more money---a substantial amount, that he was not entitled to as per contract. When we refused, he pulled his workers off the job with no notice at all. He had about 3/4 of the payment in full for the job already.
He left us with a 3/4 unfinished house, parts open to the weather. In addition while working his workers damaged other areas on our property that they said they would fix but did not. This man broke an explicit signed contract and attempted to hold us and our home hostage. He demanded additional payment of close to $4000., or almost half again the contract, and then said that that still might not be enough.
He underestimated the job and then refused to honor a legally binding contract.He also submitted bills for the extra work we agreed to due to unforeseen wood rot, etc., but never would itemize or substantiate the amount, expecting us to pay whatever they told us.
Reason of review: Poor customer service.