Noida Authority Online — Sewage overflowing for more than 1 week in sec18 Noida

Address:

C-12 Sector 18 Noida 201301

There is a sewage outlet on the ground floor right out our office in sector 18 Noida (exact address - C-12 Sector 18 Noida) leaking for more than a week. There is bad smell and unhygienic elements coming out of it at all times.
I have repeatedly registered complaint on the toll-free number but there is no response.
Our customers are getting affected and in this rainy season, it is getting really dirty.
Request to please send someone to fix it as soon as possible