Indraprastha Gas Limited [IGL] — Additional Security Deposit Consumption SD - Amount - unauthorized

Why there is new Additional Consumption SD Amount of Rs. 500 added in my current bill period 02-Sep-2022 till 04-Nov-2022.
When I called customer care, they told me that it's based on your last one year avg. consumption amount 1250.
They have calculated the same for the last year period 23-Jun-2021 till 01-JUL-2022 with the highest unit price at that time i.e. 45.96. But after calculation, it was Rs. 1231 (26.791 X 45.96) with unit price 45.96.
When I asked that it's less than Rs. 1250, now they are saying it's based on current price Rs. 53. But When I asked that it was revised after 8th October 2022 then they go answerless. and telling that's this is of Billing department calculation. Then, I want to know, who will going to stop this type of loot from which every citizen is affected. No one is controlling them. I want to highlight this before Government of India, PM, CM, Petroleum Minister that please immediately take action against fraud/loot.