+1(514) 937-9445 or Toll-free (Canada & US) +1 (888) 947-9445
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I got the same request and had same issues..
What did u end up doing.. I am so nervous that my application will get refused now..

What was the outcome here? Was your application refused for the missed submission date? I missed a submission date (2 days); uploaded the document swore I submitted to IRCC.
 
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