Bad work done by contractor — how to proceed?

Alright you all made it clear on my previous post the contractor’s work is not acceptable.

I guess my ultimate question is how to proceed? This contractor was listed on the Trex website. The company had a few, but positive google reviews.

This is my husband and I’s first time hiring a contractor to do a relatively major project for our place; it was redoing the front stairs/porch of our townhome.

I assume when we talk to him, he’ll claim this work is within reason. Anyone else find themselves in a similar situation? How did you proceed? Did you eat the cost? Hire an attorney?

I have contacted Trex customer service to see if they’ll make any comments on whether this is proper installation of their product.