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The enrollment letter that you submitted with SP extension , has which date of study completion . Mine is 27 April 2020 ( according to 3 semester) and when I am calling IRCC they are keep saying you can study , you can study but not understanding my situation I am already graduated on 28 jan 2020.
 
But if they missed some information so ircc should ask for that
No , they only ask missing documents , if they missed some information in the form , they will never ask for that . Instead of asking they look on that file in suspicious manner.