I haven't got an interview yet (I'm a bit worried about it), but I know quite a lot of people who have, and they've got straight rejections (even though they're very good). They thought the interview went well, have good grades but got rejected.
Have st.george's finished the bulk of their interviews?
And what exactly are St.george's looking for in medicine applicants?
Also how many people have got offers?
And you are welcome to raise any other issues you want to on the subject.