Bangalore Water Supply & Sewerage Board [Bwssb] — Sewage waste dumped near our house

I have been trying to call the bwssb people frm past 3 days have lodged a complaint earlier tht bwssb people had come near our house and cleared the blockage but they have dumped the waste mear our home and now its causing a lot of problems so i would ask them tht they immediately come and clean the waste tht they have dumped near our house and clean it asap