Indraprastha Gas Limited [IGL] — Name change in my BP no

I, Deepika Sangwan had applied for the bill to be changed to my name in July 2020, when I had bought the place from the previous owner, Balarampur Chini Mills Ltd. This still has not been done, despite my submitting the Power of Attorney executed in my name by M/S Balrampur Chini Mills Ltd., with the transfer application and thereafter the copy of the electricity bill in my name.
The BP No [protected] in the name of Ms, Blrampur Chini Mills Pvt Ltd at 85B, C6 Lane, Defence Services Enclave, Sainik Farms, New Delhi -110062.