Airtel — Mail login

Greetings,
My issue is regarding the Login of the Email Address, "[protected]@airtelmail.in", that used to be actively logged in through the website, airtelmail.in, but due to its closure, I have no access to the email ID. This email ID's password and credentials are needed by me as many emails regarding work are still being sent to this particular Email Address and I need to view it.
It would be extremely helpful if the company would send the credentials (password and how to access it) of this account to the email address, "[protected]@gmail.com", or to the number the airtel mail is linked to i.e., [protected].
Thanks and best regards,
Suneel.