It looks like Bonza are in a bit of strife.
All flights have been cancelled.
Can't book anything on their website.
Bonza signs at check-in have been removed.
Customers are getting refunded in flight credits in $US.
The signs don't look good…
https://www.theage.com.au/business/companies/bonza-wiped-fro…
On the plus side, at least I can delete the app from my phone.