Did you email/contact Steve @ BBCE? Steve is very helpful!
Was the box one of the newer BBCE wrapped boxes with their logo on the cellophane?
I know some people have tried to pass off boxes as BBCE authenticated boxes by simply faking he label/sticker that they use but they did not have the newer BBCE logo wrapping.
What makes you think the box was tampered with? *edit to ad* Who did you purchase the boxes from??
I would also check out what board member tsalem has to offer over at
http://www.opcbaseball.com/.
Sorry to hear you might have been taken on the box, wishing you better luck on your future purchases!
Scott