per the kobo customer care page
http://kobo.zendesk.com/entries/3708...hnical-support
Kobo Customer Care is happy to help you with any reading-related issues on your Kobo-powered Literati or LookBook.
If you are having problems with the device itself -- WiFi or network connectivity, display issues, problems with buttons, screens, etc., you need to contact Literati and LookBook technical support.
Literati and LookBook technical support is available 9am to 9pm Pacific Time at 1-800-481-7983.