Bangalore Water Supply & Sewerage Board [Bwssb] — Billing cost is high

Address: Ayyapanagar, K.R.Puram.bangalore-36

Sir,
The monthly bill which we get for our house, is huge.
we get water only once for a week, even though we need to use more, the water would come only once in a week. so usage is limited to the week accumulation. and our tank capacity is not that much.
required your at most help in resolving high bill.
We used to get penalty charges for not having rain water harvesting, even after implementing and submitting the evidence of the installation, still we get penalty charges.
can this be looked into and resolved please?