Airtel — Update email to my profile

Address:	Airtel, Kerala
Website:	www.airtel.in

I would like to update my personal data by adding my email address. I have tried all the options as per the Airtel official website instructions, but couldn’t update. I tried to call the customer service as well, but there is no option to talk to the customer service executive.
I’m not available in India now. So I can’t go to the Airtel Office directly. Thanks for your understanding and appreciated your support/assistance in this regard to update the personal data at the earliest.
Thank you