@qasim95 unfortunately they are rejecting on this very basis that " I'm not satisficed that you will leave Canada at the end of your studies"
I already got rejection letter during my previous application made on 3rd July, got rejection on 27th August.
Anyhow I have applied again on 17th Sep. medical passed, but review for eligibility yet not started "same message as yours initially"
unfortunately, now a days, they are just rejecting the applications,
What are you gona do now.? re-apply ?
Jan-2019 is approaching fast, I suggest you better take a deferral and re-apply, you will be having a plenty of time preparing the new application in good manner.