+1(514) 937-9445 or Toll-free (Canada & US) +1 (888) 947-9445
Would think it may be a while to get a response due to the large volume of asylum seekers coming from Nigeria.
 
Submitted passport at Lagos Vfs for stamping and it has exceeded the 15 working days. Now getting worried

Have you received your passport since? How many days did it take?