Mahagun Mezzaria — Flat not delivered

Have booked a flat in 2018. Nothing is being done as promised at the time of purchase.Sales and marketing people are only bothered about money after the last installment was paid they are least bothered. Every time the people say that it will be delivered next month but no progress at all in the flat construction. It feels cheated. Paying such heavy amount for a house. This is completely unacceptable. Sales person ritesh ranjan talked very rudely.