Lenovo — Mobile in warranty period.. But not repairing it saying as physical damage

Address:	395009
Website:	Www.lenovo.com

I brought brand new lenovo k6 note mob..in just few days speaker stopped working.. So i gave it in service centre.. They charged 640 rs saying its a physical damage.. There was no damage still i paid.. Now again after 10 days lower touch panel stopped working.. And when gave i gave it in service centre same answer physical damage and now demanding 4500rs.. There is no crack or any physical damage visible still.. Very low quality phone