Snapdeal.com — i am continuosly getting calls that i won a lucky draw. how to know if it is true or fraud?

Address:

600001

I am repeatedly getting calls from people who claim themselves to be the agents of snapdeal. They say that i have won a car worth 12, 00, 000 as a prize of a lucky draw. I am asked to pay rs 4, 500 for the registration of car.
They claim that the car would be at my doorsteps after 24 hrs.
I got the call and message on 9th july 2019.
They know the items that i purchased and the dates of purchase as well.
If it is a fraud i want to know how did they get my personal informations like name, address, phone no...
It is completely unprofessional o[censored] people that all our personal details are now in the hands of frauds.