lodge a complain
You go to the nearest police station and lodge a complain against all the mobile numbers which sends you unwanted sms or gives you unwanted call. Police can investigate the complain under IT ACt, IPC, TR Act .

At first police will contact with the service provider from whose number the calls and sms are coming and will acquire the identification of the users and will file cases against them. if the identification of the users cannot be made by the service providers then the service provider can stop the services of those numbers under Telephone Regulatory Act.