Need help getting activation lock off .

The guy that sold it to you has to remove the Activation Lock. If the seller won't remove the Lock, you have likely been scammed with a watch he found or stole.

The Activation Lock prevents lost & stolen watches from being used by others. Only the ORIGINAL owner can remove the Lock.

M1 Mac mini, macOS 12.5; Watch, series 5 GPS/cellular, watchOS 8.7; iPad Pro 2nd Gen, iPadOS 15.6; iPhone 12 Pro, iOS 15.6; TV 4th Gen, tvOS 15.6; HomePods, audioOS 15.5.1 and Airport Express w/ Airplay 2

The person that you bought/got this watch from needs to follow all the steps on this page;

Remove the Activation Lock so that the buyer can use it.

If they can't or won't then get your money back or recycle the watch and mark it down as a bad experience.

Neither the users on this forum or Apple can help you,only the original owner can help you.