Kerala Water Authority — Bill amount very high

Address:	Ernakulam, Kerala, 682001
Website:	kwa.kerala.gov.in

Dear sir, i stay in a rented house in fort kochi, from starting itself my bill was around rs. 400 and last month (March 2016) it went up to rs. 4000/-
I don't know how this has come, because in my house there are only three members, me, my wife and our kid. When i went to complaint to kwa they told me to change the meter for that i have to again pay rs.1500/- other the above amount.

If possible please help me

Regards
Siju