I am having a samilar problem. My Watch was not synching Activity information. It was not updating the OS either. I tried to remove the Profile and it would not show any profiles. Then I tried to upair the Watch and it unpaired on the Phone but was still setup on the Watch. So I tried to erase the Watch and went back to original. But now it will not Pair back to the Phone. As it gets stuck in a loop at
Restore from Old or Setup as New.
I select either option and it begins, but after a while it switches to Upairing Watch and the Phone goes back to initial Pairing screen.
I have tried several variations to erase the watch, force restarts, but no matter what the Watch will no not Pair.
Any ideas?