- he'll give his name, great! go report him for corruption.
- he refuses to give his name, great! tell his boss. (repeat until people get fired or your application gets approved)
If your goal is to help Ugandans, it may be more beneficial to attack a corrupt official for a bit. For all the good we're capable of doing, this immigration official is apparently a wrench in the gears capable of preventing many people from doing their work. I almost see it like writing more code while you have an error preventing your program from executing.