Had Xb8 and was sent XB7 replacement. No downgrade to speed. Over 40 devices on network.

Had XB8, Received XB7.  It’s connected but during process of scanning code, I heard something fall inside. Can’t see the white light. Not sure I want to keep the older version, especially since something is loose or broken off. Maybe it’s just nothing but how do I know? What’s the best route to take here? I was told I was getting the latest gateway because I’ve had the previous XB8 almost 3 years and my WiFi network had completely disappeared. They eventually got it back but determined I needed a new gateway and received the XB7 instead of the 8, with a potential loose part. And I don’t even want it get into the 4.5 hours I spent in chat with two agents because the first one ended it before even processing the new gateway she said I needed. Help! Please