Best place to go (Laval) to get a guitar repaired?

I bought a guitar from Long & McQuade in December and there was something wrong with it, my friend tried to fix it, and ended up stripping the action. I never had the time to go get it fixed or replaced.

Should I go to a L&M store to get it repaired? Would they let me replace it? Or is there a better guitar shop near me that can fix the action for me. Thanks!