Kerala Water Authority — charges for e payment

Address:

Thiruvananthapuram, Kerala, 695008

When you pay bill through the e payment web site they charge an additional rupees 10/- for each transaction. For automatic deduction of bill through banks it lists only one bank which is the federal bank ltd which is not even a nationalized bank. Why the automatic deduction of bill facility cannot be provided through other nationalized banks like indian bank, sbi etc.