Delhi Development Authority [DDA] — sewer blockage problem

Address: New Delhi, Delhi, 110086

We are facing sewer blockage problem Near my house D-1/27 Rohini Sector-20 New Delhi 110086 from one week, Our nearest sewers is blocked due to which water level has been raising in our commode.
No body has cleaned completely the sewer we cleaned it by private sewer clean men but after two-three days again it blocks. Please arrange the machine so that the gutter / sewerage totally clean.
I therefore request you to please take an immediate attention as the situation is really getting worse. You are requested please to look into this matter and issue the instruction for concerned official for the cleanliness of sewer.