Ow that make me smile because i raised 3 co pups and all three did the same thing. I have tried a lot, did the same thing as you but that isnt working.

So at one point i gave up went to a place with no people and dragged him all around until he knew that he couldnt fool me around anymore.

Watch out, they are smart and with their cute looks and funny tricks they play with you. And it is the game who is smart and in charge.