India Post — account no

Address:

New Delhi, Delhi, 110046

Hi rajni this side i am a account holder of your post office. Basically i lost my passbook. And i have not get anything with passbook. I mean i even do not know what is my account no.? Where is will check what is my account no. Because i have not received anything else other than passbook. Kindly help in that condition. I stay in delhi. I am account holder of sagarpur post office in south west delhi. And my account name is rajni ranwal. Pls help...