Thanks everyone for the thoughts and advice. I talked a lawyer friend here and she said that with no signed quote, this guy can't do anything. We can prove that we were still getting quotes after the date this guy said he authorized it.

I'm going to put aside my hurt feelings and try to not worry so much about what this guy thinks of me. DH listened to the last message last night and he felt the guy was rather defensive which led him to believe that the guy didn't like being called on this.

Maybe it was all a big mix up, but the way he handled it was so upsetting. I still don't know exactly what we are going to do, but I don't feel as disturbed. I will still probably pay him just for my own conscience because I still feel responsible because it would feel like I was getting away with something even if he was a jerk and did unauthorized work. I will just think / pray on it a bit.