Airco Mechanical Heating & Air Conditioning

I had Zach over my house to make a simple repair on my A/C unit, to replace a $2.50 part, took him 10 min to do the repair, The repair was done wrong, he hooked up my A/C fan motor wrong, it was spinning backwards, He then came to me with the bill and it was $300.00 dollars, I asked him why it cost so much, He told me the part was $ 175.00 I looked up the part, showed him it was only $2.50 He became very angry, threated to punch me in my head, the more I asked him to keep his voice down, the louder he got, I then asked him to leave my house, he then came at me like he was going to hit me, I told him I was calling the cops, And he said to me, THAT I DID NOT KNOW WHO I WAS F#CKING WITH, and he was going to blow up my house if I did not pay, BEWARE OF THIS COMPANY