Airtel — Mobile sim registered in someone else name

Dear sir/madam
I, Javed Ahmad Khan, am using airtel sim. Since last two days there is no network in the sim. I went to airtel store in New Delhi and been told that sim is not registered in my name, so same Mobile number can not be issued to me. I am using the same number since last 8/9 years. I purchased the sim using my college identity card when I was in Dhanbad. Also all my ban account, aadhar are linked to the same number. I need the same number. I am ready to submit all the document needed like aadhar /pan.
My mobile number-[protected](related to the matter)
My alternate mobile number-[protected]
Email id- [protected]@gmail.com
Kindly resolve the issue.