Supertech — Bogus charges in offer of possession

Address: Gautam Buddh Nagar, Uttar Pradesh

I am owner o[censored]nit 1905 in CB-2, Capetown, Sector 74. I have recently received offer of possession letter with lot of bogus charges including late payment charges, labour welfare and escalation charges. I bought this unit 2 months only. The executive (Bhawna Chopra) from Supertech took 34 days to send me the booking form and allotment letter with demand for remaining payment. I made full payment within stipulated time of Demand Letter date + 30 days but I have been charged for late payment even before they were able to issue me a booking form (booking date + 30 days). This is highly unethical. I have been sending daily emails from past 2 weeks to Saurabh Tripathi, Sachin Nagar, Manish Pahwa, CRM, Bhawna Chopra ( all sit in Supertech HO, Sector 58, Noida). I have not received even a single response. Can someone provide the escalation mechanism for this dispute.