Hello @Fitbait
If you've tried everything, there's a big chance we might not be able to help either.
The only things I know of that have helped other people are updating the Fitbit App itself, it's on 3.55 at the moment I think, and temporarily disabling any ad blockers you might have on while you try to sync (you can turn them on again afterwards).
One other possibility is clock face. Did you change it recently? There's talk of certain clock faces causing problems but I've never seen anyone actually say which ones cause problems. Trying to change it (if you're ever able to sync again, might be a good idea).
I'm sorry that you're having problems and was quite reluctant to make any suggestions because you've probably tried them already, but maybe this will prompt someone else to swoop in with the solution.
If nothing at all works, it might be worth contacting Support one more time to ask for a new Charge 5.
Good luck!
