North Bihar Power Distribution Company [NBPDCL] — Wrong electricity bill calculated

I have checked my monthly electricity bill since September 2019 and I found the following details.

JUL/20 671(OK, N)
JUN/20 58(LK, A)
MAY/20 57(LK, A)
APR/20 46(LK, A)
MAR/20 67(OK, N)
FEB/20 39(OK, N)
JAN/20 52(OK, N)
DEC/19 132(OK, N)
NOV/19 120(LK, A)
OCT/19 79(OK, N)
SEP/19 84(OK, N)
Here, see the bill of month July that is 671 units which is approximately 14 times the previous month bills.
I want to check the details of the bill again and give the revised bill.And please provide details of the bill from starting of the meter so that I can analyze too.
Consumer Name- Suresh Gupta
Consumer number - [protected]