Nextra Teleservices — non refund of security money

Address:

SOUTH CITY 2, NEAR PARK HOSPITAL, SOHNA ROAD, 122001

I have surrendered my nextra broadband convection (Registered no. [protected]) and handed over router and all the equipments in 2018.
But till now i have not received my refundable security of rs. 1123/-
Every time i contaxt customer care they assure us that it will get credit in ur account with in 21 working days. But every time they fail to fullfill his commitment.

Now i have again contacted customer care at 12.34 pm, again i have asked to wait for next 21 working days. I wanted to speak with any senior official who can answer what is exactly happening. But customer care official denied to connect the call with any senior official and told me that all seniors are buzy on another call. I have been on call for more than 17 minutes but couldn't connect with any one.

I have already raised a grievance in public grievances portal.
Registration number - dotel/e/2019/21440 for your references