Hey Arun, Its really sad to hear such news, I am sorry for you.

But dont loose hope brother, u still have chance to go to canada this Fall. Actually University of Windsor and Carleton Universities are still accepting applications.
1. Carleton is accepting application for admission and funding if space available.
2. Windsor is accepting application for admission and funding till May1.
Apply to them dude, dont waste one year just becoz mcmaster rejected you.
I got rejected by UBC, Alberta. Now Carleton is my last hope and I am planning to apply to Windsor coz having an option is a good idea.