My MacBook screen broke. How can I repair it?

The screen of my MacBook now has a big bar through the middle which is about an inch wide and looks like the mirror of another part of the screen but very distorted. I don't know how this happened, I just turned it on and there it was. I've had this computer for about a month, so it's very new. How can I get the screen repaired? How long will it take to get repaired? How much money will it cost? Will I have to get a new screen? Please help, I'm desperate right now.
I do not have Apple Care extras or any other additional warranties, just the basic limited warranty that comes with it. I also have complimentary phone service, if that helps, but I have yet to call them because they aren't in business hours.