Rs. 1500 fine for smoking??

Was having a smoke this afternoon near Juhu circle besides a tapri when two men on scooty stopped and started staring towards me.

Just when I was done and about to leave, they leaped towards me and said "smoking ka fine hai". It got me confused because it was one of those regular spots for me whenever I am back in Mumbai.

Not even sure if they were real policemen or not. One of them showed an id with some name scribbled over it.

When I said no cash to saale scanner nikal ke bole ispe pay karo 1500.

Didn't try to make a fuss as I was within 1 km from my home and my parents don't know that I smoke. But damn, felt frustrated in the moment, had to pay them 1500.

Is it common occurrence nearby? Can I do something or is my money lost?