Daintree, did you use the online application service? If you did, go back in to the online submission and check it tomorrow and you should be able see your application and in the OFFER RESPONSE STATUS column, you should be able to click on ACCEPT to accept the offer of admission. Then you will get a letter in the mail detailing how you enroll in early November. I'm pretty sure that if you met all the requirements on the mature aged form then they should offer you a place, especially considering that you are studying distance ed. In the subject I'm doing now there are 607 external students and only around 100 internals.

Good luck and I hope you get a place!