Handyman Connection

I requested a service call for an electrician to come in and change some pot lights. I provided the material. I have extras on hand. Anyways, long story short, when I went to use the light later in the day it was flickering. It was not operational out at the start and the fact that it was flickering indicated to me that it likely was not installed right. Perhaps a loose wire. Anyway, when I reached out to ask about a service guarantee, the owner went ham on me and said it was my fault, and implied it was bad parts. The right thing to do would be to say no problem, let me have someone come out and look at it. I found the man to be rude and condescending. In a nutshell, Jiffy here I come!