According to the Dominion Post it says the film is ""full of lies and unreal fantasy", "exploitative and unfair" and "anti-peace and insulting".
Iran should know, since its leader called for Israel to be wiped off the map, since it is Iran that has been testing old missiles in a show of "mine's bigger than your's" and Iran that hosts a holocaust denial conference. It is Iran where men are routinely executed for being homosexuals, teenage girls who have been raped may get executed and girls are imprisoned who defend themselves against rapists.
So to the Embassy of the Islamic Republic of Iran quite simply - go fuck yourselves. You have no moral ground to claim over the Wellington Film Festival. If you can represent a misogynistic bigoted violent government and not be offended by that, then your opinion isn't worth spitting on. The world will be a better place when you're mindless filthy twisted bigoted bloodthirsty terrorist breeding regime is overthrown.