Supertech — supertech azalia - no pre-emi payment from supertech - subvention scheme

Address: Sohna Rd, Sector 68, Gurugram, Haryana 122101, India, 122101

I have booked one flat in supertech azalia (Sector -68 gurgaon) under subvension scheme in 2015.
The company as per agreement was supposed to pay the pre-emi on monthly basis till the possession of the flat.
My subvention period with the bank is over in december 2018, beyond which the pre-emis are going from my account.
Tried to reach out to may including ankita & disha, but no one cares to provide any concrete response.
Fed up with the chase.

In addition there is no update on the construction.

Do not know whom to approach...