[Resolved]  Airtel — SOld my phone Contact list to another company

Yesterday a girl named Swati called from "Apollo health insurance" company to my colleagues asking about me, that girl called on 7 of my people whose name and number was present in my SIM card memory of my phone and when I asked that girl from where did she received these numbers, she told me that we got this list from airtel.How can Airtel give my contact list to other companies without informing me, the number from which I received the call was "[protected]"
Kindly take serious action against AIRTEL for distributing my numbers to other companies.