Mahanagar Gas — Incorrect Billing - Docket 7334762

The first bill I received from Mahanagar gas was billed from April 2021 but the connection at my home started Dec 2021. I was incorrectly billed for 7 months. I had raised multiple complaints with Mahanagar gas, but all I have is a new docket no. every time and no resolution. latest docket no. - 7334762 I have asked them to give me a revised bill minus the extra charges added for the initial 7 months and to waive off the late fee. But everytime the reply I get is we will look into the issue and get back, but unfortunately I don't receive any response.
Looking forward to get the bill revised corrected bill.