Amazon India — Call back on behalf of Amazon regarding gift

Dear Team,

Kindly note that I have recieved a call from the [protected] ( Mr Rahul Sharma) who mentioned that since I have made purchases from Amazon I have won a Maruti Car as a gift and would require me to make a payment.

On asking how he got my number he said that since that I have made purchases with Amazon he got my number.

On further enquiry, he got agitated and cut the call.
I am unhappy if Amazon has been sharing my contact details with a third party.

Expecting clarification for the same.

Thank you
Dr Deepthi A