Please answer a few questions so I can better assist with your concerns.
Are you able to power the watch on at all?
Are you using the original power chord and block that came with the watch?
Have you tried using a different wall socket to see if that shows any change?
If you are able to power on the watch, have you attempted to back up the watch and perform a reset?
Try giving this link here a shot: http://www.samsung.com/us/support/troubleshooting/TSG01003100/