The site http://ndncregistry .gov.in/ndncregi stry/index. jsp
or simply: http://ndncregistry .gov.in
is run by Government of India Agencies. Visit it and follow instructions to register your Phone Number (LandLine / Mobile) to this Registry.
Within 45 days of registering, you should see a significant drop in unwanted sms/call. If you continue to receive such communication, note time & number from where you receive this and lodge a complaint with your operator.
How to File a Complaint: ( http://ndncregistry .gov.in/ndncregi stry/aboutFileCo mplaint.jsp )
The subscriber should insist for the complaint No. which should be kept for further reference.
Hope this helps!
[Note: Even LANDLINES can be registered for NOT receiving marketing calls]