Cardiff sixth form college entrance exams inquiry

I am going absolutely crazy because of these exams... I'm an international student and I am honestly so lost?? Not only was my interview practically just an introduction of the school (the interviewer didn't even let me talk for more than a minute and spent an hour going through a 50 slide presentation), the emails my parents got were insanely vague. I wanted to take the scholarship exams, which I will actually be doing today, and asked them for quite literally anything to go off of so I can revise and all they said was that it would be based off of the GCSE syllabus and it'd be little more challenging compared to the normal entrance exams. Will I have to revise the syllabus for all of the subjects I chose? Not really expecting a reply but I'll give an update after I do them lol