Delhi Jal Board — Huge billing amount and harassed

Respected sir my k.no.is . I AM RECEIVING HUGE WATER BILL FOR MANY YRS.I COMPLAINED ABOUT IT MANY TIMES BUT BOARD DOES NOT SOLVE IT.THEY SEND ME BILL N METER STATUS SHOWN OK.
AT LAST I CHANGED MY METER BUT DUE TO CORONA LICKDOWN I submitted the documents late. My all consumption around 8 months sent in one bill n make it v.huge.
AFTER that no one accept my application n said ab kuchch nhi ho skta. Yesterday one officer came n force me to pay the amount otherwise he cut my line.
He harassed me a lot.
I fold my hands and request to check the wholecase and weive my bill.
I live in 1 bhk and only 3 members( 2 adult and a kid ) in my family.
My bill shows zero according to consumption but wrong previous bill is not solved yet.
Pls solve the matter
S.k.jain
Ph [protected]