for international calls and unwanted sms their is a mechanism to report.
but for suspected fraud callers, their isn't any.
but i have read about caller name display mechanism that will be rolled out soon by Govt., it will show name on which Sim card is being registered.
like today received a call from 7365036734 pretending to be from Airtel Payments Bank saying that APB is issuing Debit card & Passbook and asking for OTP for the same. I asked him where are you calling from? He said - "Patna". I asked him for exact location saying that I'm coming to collect it physically. He disconnected.
he comes with differnt Banking name as on
Paytm - "Bandana"
UPI - "Abidur Rahman Khan"
Amazon Pay - "Sabera Khatun"