PG/Hostel in Residential Apartment

In my residential apartment, some flat owners have given their flats to hostel people. A person is running hostel by taking 20 flats for rent (out of 85 flats). In each 2BHK/3BHK flat hostel management has kept 6-9 females. Our apartment is still not fully completed. Only 1 lift is functional out of the mentioned 3 lifts. Land owner flats around 30 are still not completed. Only 45 flats are completed and builder has allowed the completed flat owners to stay as there is delay from his side. Out of 45 flats, 9 flat owners are staying and other 20 owners have given to hostel people to run hostel. There is only one lift and it is being extensively used. There is water scarcity also in our area. Due to hostel people the water consumption is also more. The hostel people some times come very late night and talk loudly with their friends at main gate which causes disturbance to first and second floor flats which are near to main gate. I would like to know what is the process to get this hostel out of our apartment. Builder is not helping us in vacating the hostel.