JJZ Contractors review: Bad drywall, painting

I am a Remodeling Contractor and I took a chance and hired JJZ Contractors from an ad in Craig's List. I made a BAD mistake and did not verify them. I hired them to do drywall. Insulation and painting. They are one of the worst Painting/Drywall contractors I have ever used (and I have been in this business for 30 years).
They do not supply their own tools. The constantly asked to use mine. They are extremely messy in the work area. The broke things in this house and never attempted to repair them. The owner, Juan, never once came to check on his workers unless I demanded it. He forgets what he has agreed to and does not do what he agrees to do.
I want to warn any other contractor or homeowner to stay away from these guys!
I had to ask for a w-9 and insurance 4 times.
Beware! Beware! Beware!