Hello AngelsWatch,
Welcome to Apple Support Communities. It looks like you've already reviewed the article titled If your Apple Watch won't charge or it won't turn on
If you already tried all the steps in this link, and the issue persists, we'd recommend trying to force restart your Apple Watch as described here:
Force Apple Watch to restart
If you can’t turn off your Apple Watch or if the problem continues, you may need to force your Apple Watch to restart. Do this only if you’re unable to restart your Apple Watch.
To force restart, hold down the side button and the Digital Crown at the same time for at least ten seconds, until the Apple logo appears.
Restart Apple Watch
If that didn't help, please contact Apple Support to explore available service options. Depending on your region, you might be able to contact them here: Get Support
We hope this information is useful. Kind regards.