Ring Floodlight Cam won't connect to WiFi

I recently requested a replacement device which was my floodlight and i had to send back the old unit. Well my father installed the new Floodlight then put the old unit in the new floodlight's packaging so now I do not have the QR code, I scanned the MAC Address barcode on the back of the unit itself but then when prompted to connect to the ring secure wifi or whatever it says I get an error saying that it can't connect which means I can't finish the setup process. I need some help obviously I don't know what else to do.