There are some situation in appicant profile that may override your SOP consideration. The fact that you hold Masters Degree one from India and other from Sweden, I dont see relevancy for doing certificate program in Canada for whatsover reasons. Lets be honest, you are looking to Immigrate. In my opinion, reasons for your rejection is choice of program and whether you are genuine student. I have read one determination for one applicant in similar situation appealing IRCC officer’s decision and he lost JR. ( It doesnt mean you’ll lose too). In most situation, VO receives JR resolution to rely on future decision. You may need to do your research before paying a lawyer.
To say that why VO did not refuse your application in 2019, doesnt mean VO cant refuse now following new facts. It doesnt mean once you were approved, always approved. NO. Your first SP was exchange program, whereas reputation of your University gives you added advantage to your application. If you are below 33yrs old, and you intend to Immigrate, why not EE
Your SOP, you meantioned that you want to return and get permanent residency in any European Country, correct me if im wrong. If you put that narration, its possible you wont leave Canada due to same standard of living. Or the question is, if you want to secure PR in EU, why not studying Certificate program in any EU country? Why Canada?