Forget Korum take it back to the retailer and let them sort it out. From the pics, and I'm looking on my mobile so can't tell for sure, it looks like it's been crushed at some point which caused a weakness. The whipping stopped it travelling down so the damage went up the blank. Proving how it got that way is another matter, could have happened in the factory, in transit or in use, only you know if you took good care of it while you had it so gather as much evidence as possible and take it back to the retailer and make use of your consumer rights. Good luck.
Here lays part of the problem in that i cant be sure where i bought it from so dont wish to put some random retailer in any kind of compramising position. I also know that if i were to take it back to the retailer then the rep would listen to them due to not wanting to loose their custom. Clear case of ignoring the under dog and hoping theyll go away.
I can be certain it has not taken any kind of damage at any point by me or prior to purchase because i have fished with it twice since i bought it and before it broke and landed several stocky carp to 3-4 lb which would have put more pressure on the rod than i did. If it had sustained a crushing type knock it would have buckled and broken and not snapped.
The pics perhapse are too good as it is a snap but can see where it may appear like you say rob by the two lines which look like they travel down the blank. The walls have not collapsed and can assure it is a snap. It looks like there are only one or two fibres holding the carbon together which is why it happened.
I use tubes for all my corse rods to ensure they are protected so it has not been damaged and the rod is in mint condition without a scratch on it.
It is my view that if thats how korum chose to behave then im quite happy to learn the lesson for £50 which is what the rod cost and put my business elsewhere.
I didnt post this in anger at loosing money, It was out of anger at the response i recieved when i informed korum of the fault. I honestly thought they would have cared and would have wanted to look at the problem.
I have two neoteric twin tip barbel rods by them and use their terminal tackle and cant fault in any way but will i continue to use their gear after this? No. Will i recommend them or their gear after this? No. Rant over!!!