Value Infra Group — failure to hand over (failure to give possession of) flat purchased and registered by me.

Refer to my complaint id 1657234. The matter is not resolved yet.
I purchased a flat in meadows vista phase-1 in raj nagar extension, ghaziabad, made full payment to builder, "no dues certificate" was issued, its registry was done on 12.01.2015 and at the time of registry the staff of m/s value infra assured to hand over the flat after interior work in another 2 to 3 months. However the possession of the flat has not been given to me till date. However, within a few months m/s value infra closed all its offices and since then nobody is traceable. I made visits to the premises and found caretaker (Mr. Amit) who assured to hand over the key after few construction by contractor (Mr. Ranjit singh). During my last visit on 27.10.2017, i found the flat locked and nobody has the key. The key is not available in the office of flat owners association and nobody knows where is and who has the keys.