Bangalore Water Supply & Sewerage Board [Bwssb] — drainage water passing through main road smell not bearable

Address: 560078

We have already complained regarding the subject matter. No body has attended or responded til date.
We are seeing drainage water is passing through the main road and smells of fully. It is creating health hasard. The location is on 3rd main jpnagar phase4 near state bank of india.
Could you please attend and solve permanently.
Matter urgent. Hope you will do the needful.
Somesh