Thank you for your replies guys, i appreciate all your help. I have been to the flight school many times and have requested it more than 50 times. Being an international student, i would be honest that i have been fooled on various occasions when i was physically present at their facility for the request of my logbook. Some of their famous words were, "we are not allowed to give a student's logbook until they finish, and you have not finished your course."
That was their excuse all the time, and i would leave there thinking they were right. However i did some deep research, even found light from CASA telling me that according to the CAR 5.51, i should be in possession. However, today CASA mailed me back with the opposite saying that sorry, they cannot help me further and i have to sort it out myself. I am writing the flight school a letter now and stating the theft policy. just for name and shame, its EDITED BY MOD at jandakot airport. very cheap people to be honest and VERY VERY money minded. be aware.
Will keep you updated.. i just need support. thank you all