Nokia India — 2 month old nokia 7.1 not working

Address:

Varanasi, Varanasi, Uttar Pradesh, 221005

I purchased nokia 7.1 worth rs. 18000 on 1st jan 2019. I 3 month it's stopped working. When gone to service centre there is no solution and they said they will try to fix it.in meantime they will not give other phone to use.
Also they are not sure if the problem will be fixed on not. It is completely loot.
Plz take action on them. My name is tanya rai.
Staff behaviour is not good and not at all supportive. They are just like they don't care and it's not thier responsibility to handle complaints of customers.