LG Electronics — bootlooping of nexus 5x after oreo update

Address:	Thane, Maharashtra, 421201
Website:	LG & Google

Hi, at the start of this month (Oct'17) i had received a system update to migrate from nougat to oreo. The moment i updated to oreo, my nexus 5x has gone into bootlooping mode till today. I contacted lg service center at airoli, navi mumbai, they are stating that it cannot be repaired as i have exceeded the warranty period of 18 months. I had bought the phone on oct' 15.
Usually systems updates comes after testing the updates on all the phones, why was this not done on nexus 5x and if there is a hardware compatibility issues, then i should get the phone repaired for free or get a refund against it. I can share my imea number and other details on request, kindly help me get this sorted.