Torrent Power Limited - Fraudulent electricity bill

An existing appointed authorized person for chairman Shivranjani (Ghodashar) society (E-Block). I hereby writing for service no. ******* on the name of chairman Shivranjani (Ghodashar) society.
We received a bill of Rs. **,***/- against above-stated service number for the period of July-August, **** which is abnormally high considering our usage and study of previously generated bills. Through customer care centre (Torrent) we come to know that the above stated generated bill is due to an inclusion of pending due amount against bill for the service number *********.
Hence, I hereby write for seeking your attention to this unilateral decision taken by the torrent power authority. The action by torrent power is highly autocratic as well as undemocratic in nature. ser.no. ********* named on Aircel ltd which is the separate organisation has no direct operations relations with chairman Shivranjani (Ghodashar) society. This is the classic case of idiocy from torrent power who ask for due payment of any tenant from the owner.
I hereby requested to kindly update us with whose authority, we as ser. no ******* is responsible for paying the pending amount of ser. no. *********. Also kindly update us with any supporting legal document that binds us to pay pending dues of some other party. I hope that authority will understand the case & revert with some positive response, otherwise we don't have any other option but to go with legal.