Ah, that's rather unfortunate... I don't think GN will really do anything about it, as you said, they would probably say you didn't knock the edges in enough. I always put fibreglass tape over the edges on scuffed bats, as it means that you can roll the edges over a smooth surface without the scuff sheet bubbling, and because edges can always do with just a little more protection.
If it's anything, it doesn't look too bad, just knock in the surrounding areas to make the edge a bit smoother.