Accountability Question #2: The UN

How do you hold the UN accountable for its failures? How do you do it? Who do you call? Who do you as a citizen write to when you think that the UN shouldn't do things like this, for example? Who gets fired? Seriously, if anybody knows the answer, please let me know.

UPDATE:
Here's the Washington Times on the UN ignoring evidence and resisting the U.S. Senate's demands for information. And this article by Ben Shapiro sums up my sentiments exactly.