Did you try doing a factory reset? I don't know which buttons you push on the Aura, but the Glo has a way to do it with just the hardware buttons for exactly times like you're experiencing when you're completely unable to do anything through the reader interface. The Aura must also have a button combination to do the same thing.
Edit: I found this at the Kobo site, seems the process is exactly the same. Try doing the steps here. Just make sure the reader is really off, usually accomplished by holding the off switch for about 20 seconds. When my Kobo Glo was completely locked up, that did work to get the unit to turn off so I could then do the manual steps to factory reset it.
Taken from:
https://www.kobo.com/help/en-US/arti...hd-or-kobo-glo
Performing a manual factory reset
If a basic reset and a factory reset don't work, you can try a manual factory reset to restore your eReader to its original settings. After a manual factory reset, you'll need to set up and sync your eReader again. Before you perform a manual factory reset, charge your eReader for at least four hours.
If possible, turn off your eReader.
Note: If your eReader doesn't turn off, try holding the power button to the right until you see Powered off on your screen.
Press and hold the light button.
While holding the light button, slide the power button to the right several times to turn on your eReader.
Continue holding the light button and wait until the power light blinks rapidly.
Let go of the light button.
You'll see a Restoring message on the screen.