Delhi Jal Board — Extra arrear added in my bill

Address:

New Delhi, Delhi, 110089

I am a resident of D-233, Green valey apartments, sector-18, Rohini. I have paid my old bill till 27 september, 2016. And now in the new bill they have added an arrear of 1272 over the original bill of 667. kindly resolve this as i have duly paid my bill and this arrear is the extra added money, which is not supposed to be there.
The bill is dated on 3 november and even the reading is not there.