We built a new home and moved in Oct 30, 2018. On May 3, 2019, we receive a phone call from our roofing/siding subcontractor stating we will be a named defendant if we don’t pay a final invoice if approx $5000. This is on top of the agreed upon $30+k that we paid. They claimed that additional material and labor were ‘needed’ due to a change in scope of our project from the original contract. There was never a change to our project. In fact, in order for us to move in on time, we had to bring in others to complete work that wasn’t getting done. We would go days and weeks without hearing from them while they were supposed to be working on the project. In addition, our contractor used this roofer/slider on another project and they sent virtually the same invoice after the fact for ‘additional’ material and labor needed to complete the project. They were also threatened with a lawsuit if no payment was made. This sub came to us as a referral. Because it was a referral, they admitted that they did the project for cost and might have even lost $$ on it. We are pretty sure this extra invoice was their way of recovering some of the lost revenue/profit. What is our best course of action to counter or defend what we deem as a bait and switch situation? Thank you!