Airtel — lost my old number

Address:

6-6-914/1, Ambedkar Nagar, Karimnagar, Karimnagar, Andhra Pradesh, 505001

Sir, i have converted my sim network reliance to airtel, after that a year i've used that number more than a year in airtel network as a postpaid, all my links registerd with that number including aadhar, bank account, everything linked with that number now am suffering alot now, since 1year 9months am not using that number i need that old number again.