Municipal Corporation Of Delhi — Sewer blockage

My house has a sewer drain next it which gets chocked very regularly. Because of which our house gets flooded specially our toilets, as we are on ground floor.
Since its rains and due to covid and dengu season it has become all the more dangerous. My parents are old and it is much more difficult for us to handle this problem. Please help clean up the mess and sewer.

Address : 129 - a, gg-1, vikas puri. New delhi