Delhi Jal Board — way too excessive bill!!!

Address:

New Delhi, Delhi, 110015

I have been getting bills from delhi jal board which shows 100 plus points more than the actual meter reading. (K. No [protected]) due to which its highly over charged.
I have been contacting them since january 2018 regarding the same but they are not solving my issue at all.
I have also submitted 2 letters (Attached below) to them, as they asked me to do so, dated 12/1/18 and 11/5/18, to which also they haven’t responded at all.
The concerned person mr. N. C saini (Mob. [protected]) just says one line everytime “kal kaam hojaega aapka”.
Please resolve this issue to the earliest so that i can get my actual (Much lesser) bill without any penalties.
Regards
Ritu gambhir
[protected]