Delhi Jal Board — not getting pre alerts

Address:	110060
Website:	+918527280203

Am resident of 3/20 first floor, old rajinder nagar new delhi 110060.
The entire building is getting bills in name of mr. Rajinder sethi-from whom i purchased this flat 15 years ago-it becomes difficult to identify whose bill is what?
Will request to update telephone numbers like bses enabling identification and pre alerts.
Response solicited.
Dr. Rakesh trikha
Mobile [protected]