So why sit on it?
First, the UN Mission was destroyed and many of the UN workers were killed or are still missing, so they couldn't release it.
Second, Bureaucratic red-tape would have taken days if not weeks to cut through, so it likely would have never been released.
I don't think it is “looting” if people break into a building to take what was given to them to live but government policy said they couldn't have yet.
However, hang each and every person selling food out of a UN marked bag.
From a public lamppost, with a sign around their neck.