Count me as one of those who feel you got screwed for a ridiculous reason. One question - in your OP, you mention both the tournament director and the assignor. Did you ever find out whose decision this actually was? It may have been the tournament director's. You kind of imply that when you stated you felt the assignor should have "had your back".
One other comment - if you had any plastic in your hair, it could have been a safety issue, but your partner not only had nothing in his hair, he didn't even have any hair. Did he have metal clips in his moustache?