Hi everyone - Kobo sent these instructions to me for a 'physical' factory reset and I thought they'd be helpful to those that have errors they cannot resolve through tech support.
You can do a 'menu' factory reset by going into Settings, Privacy, Factory data reset. The attached instructions seem to be a preferred method, or a method that must be used if you cannot turn on your Vox.
Remember that the Factory Reset erases all the data on your Vox and resets it to its factory state. Should be used only as a last resort -- or if you want to test its effectiveness like Taming did