how can i track my stolen iphone 6 if its off since the time its gone

Day before yesterday my iPhone 6 was stolen in india

I've been trying to track it since then but have been completely unsuccessful in every manner. I have also complained in the police but the cops themselves say that it is impossible to find it as complaints since 2 years are pending.

The phone is switched off since the time it was stolen and I have lost all hope, kindly help.