Airtel — Not providing detailed Paper bill

Address:

RAIPUR

Dear sir,
i am the customer of Airtel Fixed Line from 2007. my Telephone no is [protected] named Pawan Kothari, C/o Mohta Medical, Raipur. We are enrolled to receive Only Detailed PAPER BILL but from last 30 months we are not receiving. Raised complained several times (almost every month on date 25-28th). complaint Call center always essure to sent Paper Bill in next 5 days, but never received it once. I also several times requested them to send me a letter mentioning "airtel is not able to send Paper bill", But there is no solution.
why are they not sending us a detailed Paper bill, is there any GHAPALAA?
kindly look after the matter and order them for provide Paper Bill regularaly.
Regards
Pawan Kothari