You probably haven't heard anything because you haven't sent everything. At my final interview, my casual photos were not clear enough and they told me if they needed more casual photos, that they would let me know via email. They emailed me for more casual photos so i sent that. Than they sent the image and uniform standards form.
A friend of mine who also made it to the final interviews, she has been waiting also for over four weeks now and has heard nothing, no emails.
I just found out that one of the girls that went for the FI got a rejection email
Now im worried.
Let me know how you go
I hope you get some good news soon