Mahanagar Gas — too high bill

Address:

Mumbai City, Maharashtra, 400102

Dear sir/madam
This is regarding my gas bill of this month sep 2019 which is too high as compared that of what i have been receiving all the previous months... Which is rs 1472.. M shocked as i was out of city for a week.. Till now i always got bill around 300 to 400 rs.. Why is the sudden shoot up in the bill plz do the needful n rectify my bill asap