I can’t get my phone to connect to my new watch I bought it from a pawn shop and now I can’t get it to link cause it is linked to the original owner

Return it to the pawn shop;

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.