Bangalore Water Supply & Sewerage Board [Bwssb] — drainage overflow in my area

Address: Bangalore, Karnataka, 560077

There is a drainage overflow in my area where the full drainage connection recently re constructed. Only for yesterday's 2 hours rain, if all the drainage in my area overflow and even drainage water enters my from the kichen pipe, then think about the rainy season. What is the use of re constructing the drainage pipes recently??
I need this to be auctioned as soon as possible.