Runwal Group — Delay in registration and possession

Flat is booked in Phase 1, tower b2, flat no 2301. Had paid the amount for registration on 29th September 2020. The process of registration was finally completed on 29 January after lot of complaints and fighting. Now, after completing all the payments, the Customer representative never answers the phone and is very rude in dealing with us.
We cannot figure out if the flat is purchased or given as charity.
Very disappointed