CONTRACTOR SEEKING LEGAL ACTION ! HELP !!!

[Jose Trujillo]

Hello BP !!

So I recently hired a floor polisher to polish a Terrazzo floor i have on my current and first flip deal. We agreed to pay $2000 for the entire job. Midway through the job he asked for a partial payment. Considering what he had already done i gave him $600. He "finished" the job a week ago, but when i went to inspect what he had done he did not correctly repair some damages the floor and he did not even try polishing the edges around the house. I told him i would not pay until what we had agreed was fulfilled, he then went to "fix" what was left and he did a mediocre job and called it done. I still have not paid him the remaining $1600 even after several conversations and arguments over the phone. On our last conversation he mentioned "if you are not going to pay me then i know just what to do", I am at a point where i cannot afford going to court if he decides on taking legal action. So guys the question is the following.

I will pay him $1000 for everything he did plus the other $600 i already paid, but how can i retain and keep record of this in a legal way so he does not get to me later on ? Would a simple notarized letter stating what is going on be sufficient in court ? Is there any type of legal form i can seek online ? Do you guys have had a similar scenario in the past ?

Thanks in advance !!!