The other person got your electricity bill, license, photo etc.???
Seriously how this is possible?? do you give such important documents to anyone???
Go to Airtel Nodal Office or Call Customer Care and get Airtel Nodal Office Phone Number of your area
Cheers!!! and Please don't expect any immediate action as these Fu(cking operators takes too much time to resolve the matter
Worst Case: Dial 100 as whatever the other person will do you will be responsible for that