Not Happy With Aire One in Hamilton

We bought a brand new A/C and furnace about 2 months ago from Aire One. Every time we turn them on, it makes more noise than the old one. The noise is there regardless of heating or cooling. I was told the fan must be adjusted from factory settings. I called the service department who gave me a window of 4 hours for the technician. I said that I can't leave work to come home in the middle of the afternoon. I asked for a smaller window. My logic- They didn't install it right; so come at a time convenient to me. I didn't pay thousands for this. Regardless of this, the technician comes when we are not home and leaves a note saying that he came and we weren't there. So it will cost us $55 for his visit!! Again, this is not a service call that should be charged to the customer because I believe this is left-over work from incorrect installation. Also, just like the other customer from Mississauga mentioned, it takes almost all night for the A/C to cool from 81F to 75 F. Our 20 year old Air Conditioner was cooling way faster than this. How can they be selling a product like this and not admit, it is not good? Not to mention the Service not being customer centric. If this is not fixed fast and for free, I am going to BBB.