AUS2ONE has just recently posted the following on their Facebook page:

[Announcement]

Hey everyone. We know that everyone's been waiting for word from us, and we appreciate everyone's patience. 

As of now, we have confirmed that the concert will be unable to proceed on February the 16th due to unforseen circumstances. 

We will release more information as it becomes available on the next steps for the concert.

We're sure everyone has many questions regarding the concert and emotions are undoubtedly running quite high. We will open communication via an e-mail address asap to address everyone's concerns.

Unfortunately us in Australia are now unable to see Block B and any other artists that were attending.