Bangalore Water Supply & Sewerage Board [Bwssb] — Drainage

Sir/madame
i am sivaraman residing at #121, 3 cross, ISRO layout, bangalore.
phone:26662326 Mob:[protected]

in 3 cross 1Amain ISRO layout the drainage is getting blocked quite often. my house is worst affected due to this. lot of trees has grown and the roots of these trees are spoiling the underground sewage system.
your cleaning offcials have visited and checked. they are unable to locate 2 chambers. however they cleaned the other chambers.
they have orally informed me that the sewage pipes and chambers require replacement.
i humbly request you to address this issue on priority basis and please carry out repair works.
thanking you
m.sivaraman.