Change all passwords for the accounts where your information may have been compromised.

Block your debit/credit card by calling your bank’s toll-free number if necessary.

Write down as many details of the compromised information and how the SIM swap 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 here.