Mi — Service centre not giving warranty when it is a hardware problem

I went to mi store for getting my warranty of my redmi smart band and they said we will not replace or repair it because it has little scratches on it which were obvious after use of 10months the scratches were natural and the problem was not from scratches which they admit they problem was in hardware which was completely covered in warranty in and almost 1 month left for warranty and they just procasting from giving warranty which means they doesn't want to give warranty and this is a way of robbing consumer i talked to customer care they all said that if there are scratches we cannot so anything even though it is the problem of hardware