In my experience, unless you are talking to the CEO or chairman of the board, there is ALWAYS someone higher up you can insist your inquiry be redirected to - a supervisor, manager, VP. Anyone you call on tech support or talk to in the store has a boss above them.
i found this on the Fido forum, second post is by a moderator:
http://forums.fido.ca/t5/forums/forumtopicpage/board-id/NonTechnical/thread-id/1 576/page/1
My understanding is that a carrier must submit the unlock request through proper channels to Apple (with all necessary information), and then Apple initiates the unlock. You plug your device into iTunes, the unlock goes through, and you should see confirmation of the fact in iTunes. So the actual unlock is handled by Apple through iTunes, but the request must come from the carrier. By everything I can find on the web, Fido offers to unlock all of their devices - if the people you are speaking to say otherwise, insist on talking to their supervisor or boss, or go to a corp. store and ask to speak to the store manager.
No second party unlocking service could even do it - they don't have access to the apporpriate databases and information. Any such "service' is hacking phones, not formally/officially unlocking them.