Cedrico, I also did the assessment back in July and my application has been "under review" for a long time as well. I too got the same message like you did but never received an email. I didn't wait and just gave recruitment a call as sending them an email is pointless, they never (or almost never) reply to emails. The lady I spoke with was super friendly and in my case it was basically a mistake, I was put in the wrong pool.
So my advice is: just give them a call! :-)
Good luck.