Indraprastha Gas Limited [IGL] — not getting the bill

Address:

New Delhi, Delhi, 110085

I am not getting the bill of the indraprastha gas pipe line at my residence and even not at my work place and after that i am getting a letter of immediate disconnection if bill is not paid. Howsoever the letter is dated in the starting week of october and i am receiving it in the end week of november. Can i get the answer for my query? Please provide me a good explanation of this behavior and i want to know that how the customer should tackle these things. Please provide the numbers of the office which even the persons pick. No phone call is picked in your office.
Thanking you