Municipal Corporation Of Delhi — unauthorized construction/nali blockage

This is sazida h no.-3 Jagdamba Colony Ali Village Sarita vihar new delhi 110076. I am very sad to say you that nali is fully blocked from 3-4 days and dirty water is spreading in my house and the street or mosquito's are coming and this is a very harmful for our health so this is a request you to kindly clean the blockage. In my area they have unauthorized construction are there due to this water does not pass thorough the nali. Even they are toucher the people who register the complaint against him so kindly help me or resolve the issue as soon as possible..