Some advice - the process has obviously fallen over somewhere and someone at go-pro knows what’s happened. Train your staff better in customer service and advise your customers of the problem. I would be a lot more tolerant if you could say we’re sorry there was a problem verifying your trade in, we’ll work on it and try as hard as we can to get you this before Christmas.... that is all that was required. The frustration for most customers is being left clueless with the feeling that no one is really taking ownership of their case.
At its core, a GoPro is a small camera the takes the best qualities of point-and-shoots and camcorders and packs them into a rugged frame that’s smaller, waterproof, and virtually indestructible. Inside the cuboid design is an image sensor, processor, ultra wide-angle lens, and up to three microphones for recording audio in different conditions. The users interface is made up of just two or three buttons, and the Hero5 Black and Hero6 Black models feature touchscreens for more control.
And sure, those options could include your waterproof and crack-resistant smartphone, but keep in mind that the best action camera is designed for this kind of shooting. Plus, just because your phone is tougher, it doesn't mean you should risk losing or damaging the thing that keeps you connected to work, family and friends. It's also way easier to mount one of these to your body, car, bike or anything else than your phone. 
First of all, the camera itself is physically different from last year's version. Most notably, the Hero 8 now has the mounting fingers built in (meaning, the "pins" that slide into the top of a pole). This means you'll no longer need a "frame" mount to connect it to accessories. This also means easy access to the battery and memory card at all times. Another perk is that this reduces the total footprint of the camera when mounted.

underwater camera housing