What speakers for amp and Receiver

Hello, new member here. I just want to start with saying I'm just getting started with my first big sound purchase. With that said, I just bought and had installed my new speakers, receiver and secondary amp. I feel like the installer did not install this correctly as my new system does not sound much better than my last. My question is what speakers should they have put on the second amp and which go to the receiver? I bought all this at a steep discount and still went over my budget. I know it does not all match perfectly but they said it should still sound great. This is the setup i have and it's going to stay this way for a while. this is my new equipment. (Receiver) Integra 9.2 DRX5.4, (Secondary amp) Bowers & Wilkins Amplifier CDA-4D 4-Channel Compact Distribution, (FL&R) Focal Omada N3 3-Way Floor standing Loudspeakers, (Center) Focal Omada Center 2-Way Center Channel Speaker, (Surrounds) Focal 300IW6 White 2-Way In-Wall Loudspeaker, (Rears)  Focal 100IW6 White In-Wall 2-Way Loudspeaker, (Atmos) 4- Focal 100ICW6 White In-Wall/In-Ceiling 2-Way Coaxial Loudspeaker, and 1 SVS PB-2000 Pro Premium Black Ash Subwoofer. Any advice is apricated. :)