Broke Bangle2 right at strap connection

Argh, sorry to hear that.

I guess you never found the bit that came off?

I'm not sure how hands-on you are, but the case is made of ABS plastic, which is pretty common and could be repaired in a few ways:

• In the unlikely event you have one, it seems some models of '3D printer pen' (eg https://reprapworld.co.uk/3d-pen-filament/3d-pens/3d-pen-black-with-lcd-display-pro-version) go hot enough they melt ABS, so you could just use some ABS filament and 'draw' a replacement bit right onto the case.
  
• If you got another piece of ABS plastic (printer filament, or there are a bunch of normal plastic things that are ABS) then you could mix a little with some Acetone to make a bit of a 'mush', then you could put that all over the area, file it down and drill the hole again and it should be almost as strong as new.
  
• You could also just add a drop of 2 part epoxy (eg. Araldite) over it, and that supposedly has quite a good bond. It's a lot easier, but I'm not sure it'll be as good as using ABS plastic.
  
  

Hope that's some help!