Is it this one?: http://www.giant-bicycles.com/en-US/...en/2285/32115/

If so, you probably paid a lot of money for a nice bike. Obviously you bought it new because you expected it to be working!

Considering the price point, it's more likely the builder that messed it up, not the components. Return it and demand a refund or a re-build, or at least a replacement of faulty components before they can void your warrenty. I wouldn't go to other shops, just because you are risking your warrenty doing that. I would go over it and double check what the rules are on that thing. And keep all your paperwork/reciepts.

Since they sold it to you, they should repair it or replace it for free. There's no excuse for selling you something that expensive in non-working condition. In fact, a shop that treats customers that way is probably a crappy one to begin with!

Don't let it slide. you deserve what you paid for!