Delhi Jal Board — Incorrect Water Meter, resulting incorrect bill

On 24th Oct, two people of DJB visited my home, captured a photo of meter reading(778) and updated incorrect reading(809) and yesterday(25th Oct) I received a bill of 6k+
This is not first time, last time they did the same thing, updated wrong reading and generated a bill of 56k. They reduced the bill to 5k in 6 visits of Yamuna Vihar Delhi 53 branch and took 3 months.

I don't know why DJB hires such illitrate or uneducated people who cannot even update readings properly in system/tablet.

I just want them to work on my issue, they should not do this everytime or with anyone, Updated the meter reading properly and provide a genuine bill
KNO