Bangalore Water Supply & Sewerage Board [Bwssb] — sewage blockage

Address: 560022

There is a sewage blockage in annapurneshwari apartment LIC colony yeswanthpur bangalore-22 from past three months.It has almost getting filled and creating breeding grounds for mosquitos.
we had already complained regarding this issue before but still no effect has been taken.
I would kindly request you to take an effect regarding this issue.
Thank you,
Citizen of india.