Bangalore Water Supply & Sewerage Board [Bwssb] — Incorrect billing

Address: #66 1st cross St Thomas town, HM Road Lingarajpuram

Dear sir As we stay in 2 bhk independent home in lingarajpura HM road.. We're we are 7 members in my family I am getting a water supply from bwssb.. Every month there is different consumption now it has reached 109000 literally per month. Earlier we used get the billing consumption of 17000 liter every month.. And the billing amount was ₹500 to ₹600 ... When I started getting bill ₹1200.. With a different volume of consumption I rised a compliment in C3 bwssb office but nobody took my compliment. Then I stopped playing the bills now the amount has reached to ₹27000 .. How can family of 7 members use 109000 liter of water per month