The new winter event brought a plethora of items that should be available at the event vendor NPC.
Sadly one item in particular was blatantly REMOVED from that NPC and anything close to that hairstyle can only be bought from the CC store.
Item in question below.
It even states CAN BE REDEEMED IN THE EVENT SHOP. But of course it's not there.
How it looks like in the store from Taiwan:
How store on EU looks like: