Change all passwords for the accounts where your information may have been compromised.
Write down as many details of the compromised information and how the phishing attack occurred.
Visit a police station to file an FIR.
File a complaint through the official National Cyber Crime website https://cybercrime.gov.in
The toll-free number of the Cyber Crime Cell for any assistance required whilst filing a complaint is 1930.
Contact the cyber cell department of the RBI. The list of all nodal agencies across India, along with their contact information, can be found on here.