If you're in Melbourne, I assume you passed VCE, and that in itself guarantees you passed year 12 English. You dont have to have done very well in it - under the victoria system, simply turning up to every exam and handing in every assignment means you pass.
Actually, I don't believe turning up to the exams is compulsory in the VCE. You can still pass assuming you've completed all the in class assignments (called SAC's when I did it). Attendance to the exams only provides you with a study score.