I don't think they can tell you specifically whether they receive your application or not before processing it. Do you have a tracking number so you can check if it's been delivered already? That is your best shot to know whether they got it or not. If you can track it then check the delivery day and when you call the FBI they will be able to tell you the applications they are currently working on (based on the date they were delivered).
Check this thread, they do a pretty good job updating the FBI processing times: http://www.canadavisa.com/canada-immigration-discussion-board/-t247817.0.html