IIR the cam pins are all the same length.
There is not a longer pin in the shop.
There could be polishing compound in the small pin hole or bead blast in the hole.
we clean the holes out with a 1/16" drill
If you don't have a small drill a small paper clip may help clean it out.
Also most hardware shops carry 1/16" drills probably 2 or 3 bucks.
If that is not the issue call the shop on Monday.
Whatever your hand finds to do, do it with your might; for there is no work, nor device, nor knowledge, nor wisdom, in the grave, where you go.