Locked Apple Watch

ONLY the person the watch is locked to can remove Activation Lock. We see people here every day of the week who bought a previously owned Apple Watch, which is locked and in most cases the buyer cannot reach or doesn't actually know the person the watch was locked by. If that is your situation, there is no help you can get from Apple, nor us. If you can't reach or don't know who the watch is locked to, either return the watch for refund or recycle the watch responsibly if you can't get your money back. Chalk this up to a bad buying experience and never buy a used iOS based device unless you can see it in person and know in advance Activation Lock has been removed.

Here is a user tip I wrote about buying used devices --> The All Too Common SAD Reality of Buying … - Apple Community

return it

the activation lock is not really on the watch it's a

theft protection measure on apples servers

it needs to be removed

About Activation Lock on your

Apple Watch - Apple Support

 if you don't know your appleID

Recover Your Apple ID - Apple

if that does not help you then you need the assistance of apple

Additional Support - Activation Lock (apple.com) and or

Get Support (apple.com) , Genius Bar Reservation and Apple Support Options - Apple