I just found a page of sample topics for this presentation, and it sounds as interesting as A-levels. ie Not at all. Surely every German student in the world is sick of talking about gastarbeiters? The only things more cliché than that are the Algerian War, and muslims for the French students?
LOL at there only being one suggested topic for Italian, and it being about the mafia.
I hope they do let you resit! I can't see why they wouldn't (well, beyond UCL being UCL, I guess).