Mahanagar Gas — excessive bills

Address:	Mumbai City, Maharashtra, 400078
Website:	MAHANAGAR GAS LIMITED

My bp number is [protected]. From last 6 months my meter reading was stable, suddenly for the month of december and january, it has gone high like anything.
I had paid maximum 300/- since last 6 months, but this time for the month of december and january, i have received a bill of 3427/-. When i called the customer care, they say that they will not even file my complaint on this issue. And i have to pay this amount. This is seriously utter chaos.

Please look into this matter and let me know why there is a sudden increase in the bill amount.

Regards.