Did the installer give him some kind warranty you're aware of? If so, maybe some salvage can occur, at least in the speaker zone. I give you tons of credit Nick for holding back especially for someone like you that's sounds rather passionate for their audio.

FireGuy
M22V3/M3ti/M2V3/Omega Super 5/Aperion 5C/OutlawLFM1+Sub/Denon AVR1906/YamDVDC750/AS AMP110