Is $7,000 to redo a bathroom (labor only) a fair price?

I recently had my bathroom redone by a referral of a friend of mine. I was charged $7,000 for labor costs only. There were some key critical errors that I did not like, one being the plumbing work to my bidet toilet was done incorrectly, causing my toilet to leak water from the bottom when I flush it, and the pipes of the toilet were leaking water as well. I brought it up to his attention but he did not want to fix them and was very stubborn about it. My wife accidentally handed him the payment in full via a check before I noticed these errors, but thankfully I was able to successfully cancel the check by contacting my bank. I mentioned to him I would gladly make a new check once the mistakes were fixed but he did not want to fix them. At that point, I asked him for his contractors license number and he told me he was not a licensed contractor. My mistake was I never asked him in the beginning if he was licensed before he started the job. Yesterday morning I was served a small claims document; he is suing me for cancelling his $7,000 check. I’m afraid I might have potential water penetrating into my crawl space over time from the linear drain he also installed for my shower area.