Maharashtra Natural Gas [Mngl] — billed incorrectly in my first bill

Address:

411028

Hi,

I took Household gas pipeline connection in February and in june I received my first bill

BP number[protected]

I have received my first bill and I have been billed incorrectly with amount Rs 6663.

Why Rs 6550 has been charged as arrears in my bill?
I have already paid approx Rs 6500 while taking up connection.
Pfa bill and send me correct bill asap
Note :i have sent email to [protected]@mngl.in also.