There's nothing to repair. The crack is confined to the face and I couldn't glue it even if I tried. The only solution is to take a mallet to it and flatten out the damage.
Morale of the story: Wrap your bats in cotton wool and never use them...
or accept that if you play stupid shots and try to smash every ball, this kind of thing happens.
There's nothing wrong with the bat, just the idiot holding onto it.