My recommendations are: Have you contacted NBN? They may have a process whereby they can obtain entry.
If not then you may need to seek an Order via NCAT and possibly an Interim Order if the matter fits within their definition of ‘urgent’. A phone call to NCAT may help steer you in the right direction:
Contact NCAT
Telephone 1300 006 228
1300 00 NCAT or 1300 006 228 and follow the prompts.
- Press 1 for Consumer and Commercial Division
- Press 2 for Guardianship Division
- Press 3 for Administrative and Equal Opportunity and Occupational Divisions
- Press 4 for Internal Appeals
Interpreter Service (TIS): 13 14 50
National Relay Service: 1300 555 727