Vastu Vihar — Registry not being done

We have booked vastu vihar simplex in 2019 and till now they have not registered it under our name. Further along 2021 it was revealed that the land is not owned by vastu vihar itself and hence they are not able to provide the registry. They constantly ask for money to progress the work with no deadline of when the land will be handed over by the original owners to vastu vihar. This is happening in Giridih, Jharkhand.