Delhi Jal Board — wrong billing of water consumption

Address:

B1A/27B, JANAKPURI, 110058

My sister dr (Mrs) tripta verma, retd associate professor, [delhi university] stays at b 1a/ 27b, (Dda mig flats) janakpuri, new delhi, her water meter connection k no. Is [protected]
She is abroad in usa since last three months. She has asked me to lodge this complaint on her behalf. She had paid last bill as per meter readings, for rs. 4831/- on 25.04.2019.
Now she has seen on internet another bill for rs. 1077/-. {to be paid by 26th august 2019} some arrears to be paid are shown. This is totally incorrect and we lodge a strong protest. When premises are locked and there is no water consumption, how another bill can be raised. Please withdraw this bill urgently.
Thanks
N. K. Sethi
For dr tripta verma (Mobile — [protected])
My mobile — [protected]