But if in case we do reapply & a letter of invitation from the member of the parliament will it help our application?
Hi - here's the thing about letters from MPs (or other public servants of Canada).
Canadian Immigration Officers are independent decision-makers operating under the rule of law and directed by established practices and policies. Letters from other government types are not given much positive weight and can even be resented.
A desperate need to
visit Canada is suspicious, and the MPs letter can look a little desperate.
If the MP doesn't have personal knowledge of your purpose, plans and financial situation - not the person in Canada inviting you, but you - then the letter is viewed as a generic missive designed to please the MPs constituent without regard to any resulting TRV being issued. They produce these general message letters and they're worthless if not damaging.
If you want to come to Canada TEMORARILY then have a good reason, plenty of your own money and some very good reasons to go home again. It really is just that simple. If those three things aren't present then it's the officer's job to refuse the application no matter what anyone says.