Saying "the executive office complaint line" isn't implying it's Facebook's complaint line. There is no legal obligation for the person on the other end of a call to be who you expect.
Who would even assume that such a thing would not be outsourced if it were affiliated?
And "a priority incident" can't be a misrepresentation inasmuch as "priority" is inherently relative.
As a matter of "legal realism" people might be right that it would land you in prison if you are just Joe/Jane Schmoe. But I see absolutely no logical justification for that when companies do things at least as shady all the time without serious consequences.