Schools never guarantee something, take for example James Ruse, they don't exactly guarantee 99 for every student that walks in, they provide the service and the students have to put in the work, not every 99.95 comes out of James Ruse, but they have a higher chance of getting that mark. You can't tell the school to give you something if they can't do it. Quite sure if she had the ability, "as claimed", the HSC would of seen her marks as an outlier and moderated them accordingly, or the school would come into audit the school