Cracking on neverfull monogram

Have I to ask specifically for it? What if they offer to repair?
They won't offer to repair on such a new bag. Just go in and tell the SA you are concerned about the handles on your new bag. He/she will take the bag to the back and return with a new one. And in the unlikely case they offer a repair first, you can always request an exchange. Don't worry, all SAs at all luxury stores deal with this stuff all the time!