Bangalore Water Supply & Sewerage Board [Bwssb] — overflowing drain

Address: 560061

The drainage is overflowing and there is foul smell all around at the following address

1st main ksrtc layout chikkalasandra bengaluru-560061

Tried calling up the authorities at the banashankari 2nd stage and they gave us a number and directed us to call padmanabhanagar. We then called up the padmanabhanagar office and they gave us a number and directed us to call poornaprajna layout office where no one picks up the phone. Not sure how to handle this and hence posting a complaint over here. Please help