NHAI — no response on complaint helpline

Address:

Shivpuri, hapur, Panchsheel Nagar, Uttar Pradesh, 245101

I tried so many times authority number bt no one is there to answer the call. Is operators are not available there or these numbers are just for formality or authority offocials have no time to answer the general public call or authority officials take salary for just only take rest in office?
Please look forward in this matter asap otherwise i forward my complaint to ministry of road transport and highways.