Delhi Jal Board — higher bill of water kno [protected]

Sir we are two old people living in this house .My age is 70 and that of my mother is 93 years. Yesterday I received bill from your department which is on very higher side .It is highest in last 40 years .It is 3390.Sir can two old people consume water of this amount ? If you take average of last 12 months bill paid by us it is around 1000 rupees .So there is certainly some error .Please extend all possible help to two senior citizen .We are paying bills regularly so there are no previous dues in bill .Please help .Thank you