[Resolved]  Airtel Postpaid — Calls from airtel

I am working for Sobha Developers limited, in Bangalore.The company has given me a post paid airtel connection - [protected].For the past 3 months i have been getting calls from airtel, asking for Mr Prasanth Gururaj. That person has not paid his bill and my number has been given as an alternate number. I absolutely have no idea who this person is and i have been telling this to the Airtel personnels who call me. But calls keep coming and every day i have been getting these calls for past 3 months . I have called 121 and complained twice. But they told me that there is no way these calls can be stopped as that person has given my number as alternate number. I cant keep on answering these calls which comes about 2 times a day from various numbers. Please find a solution as soon as possible.