That is odd. Bats come with a 12 month (or at least a seasons) repair/replace warranty that covers almost all circumstances. In my opinion, that damage can't be deemed as deliberate misuse or player error, so would be replaced as i highly doubt it is effectively repairable.
If you had purchased from us, we would have offered a replacement from what is off the shelf and then sort out a replacement for our own stock with GN.
If we had nothing that suited you in stock, we would be at the mercy of GN in terms of how long it would take to replace your bat from their stock. I imagine this is what is happening right now with your bat, Owzat are a big company so can't be expected to remain in constant contact with every customer, but if you ask for an update and get ignored, that is when i would start to worry/get annoyed.