Here is the problem. The core of your request for asylum was, that you did not feel safe in your country and they have failed to protect you. With that said, by returning back to your country for whatever reason (regardless if you got cheap scholarship, found a cheaper medical care or if your mother was on a deathbed and your siblings were begging on the streets) is just showing that you do not feel that your life is threatened there, hence you do not need protection of Canada anymore.
What you want to do can easily lead (and most likely will) in the revocation of your PR status (when you will request for citizenship).
Refugee status is a one way road without much possibility to return.
Only if you reject your previous citizenship (after receiving another one), you would be able to do it.
Or if the situation that lead you to take the refuge had changed. But again, that could cost you PR, since refuge and asylum claim were supposed to be a temporary solution (like waiting for war to end or for the regime to be overthrown).