Delhi Jal Board — wrong demand notice issued in spite of meter is working okay

Address:

Delhi Jal board, Delhi, 110085

This is to inform you that my water connection and meter is running okay as per survey of your staff during may cycle and my current reading has been noted by taking an image of meter by your staff.
Earlier meter was illegible due to vapours accumulated over it, now it is legible and i have not consumed more than 20 units in any month
Please issue a revised bill which i shall pay

Regards,

K no. [protected]

Neelam jain w/o sunil jain a-3/204, sector -8, rohini, delhi