Boat — Rockerz 450 pro cracked during my normal use

Hi, bought rockerz 450 pro headphone. it's cracked during my normal use within 6 months. I know there is no warranty for physical damage. But it happened during my normal use and within 6 months. But they deny my warranty because of physical damage. My concern is that It should last for at least a year. There is a reason i bought rockerz 450 pro. I bought it for long lasting. I could also buy cheap headphones than this. Please do something about this.