Send an e-mal to CIC  (OttPilot-Immigration  @  cic.gc.ca) with all your detials like below and ask for the file number and they will provide you.
Respected Sir/Madam,
 
I, Mr. ( Your name) and a CEC July-2013 applicant ( My Application package reached your office on yyyy-mm-dd) and credit card was charged on yyyy-mm-dd and i could be able to see my application status as " Application received" since yyyy-mm-dd on ECAS, but neither me nor my lawyer did receive file number by e-mail or by mail yet.
 
SO, can you please,  send /provide me with my file number so that i can be able touse it for future reference if required.
 
please find the details below.
 
UCI                          :   
Applicant last Name:   
Applicant First name:
DOB                         : 
 
Thank you so much for your help and response in this case in advacne