And to add to what
@rogelcorral has just said, they will look into your academic transcript. Experience shows students with poor grades are most likely not committed with studies, but were working over hours. If you fall in that category, expect officer to pack your application and pull your file from other sources. But bottom line, rule is very clear-20hrs a week. I have seen you referred your brother to justify your wrong, and some poster were like you should be okey. You’ll only be okey soon you have your PGWP and PR