Airtel — not getting call history

Address:

New Delhi, Delhi, 110030

I want my call history of december, 2017.
It is very urgent because i have deleted my call log of phone and i didnt save the phone number of the person that i need to talk.
I have already contact customer support they told me to send message to airtel which i have send but still i didnt recieve any call history.

Message which i send to airtel 3-5 times.

“eprebill email id” to 121 {format}

I sent it like this eprebill dec [protected]@gmail.com and then sent it to 121

Please send me call history of december 2017.

My mobile number : [protected]
My email id : [protected]@gmail.com