You can reset your device to factory settings. To do that you will need a resetting magnet provided with your device. Manual describes in which place you should put the magnet to reset the device. Put the magnet in the right place, wait for 5s until the device restarts.
After restoring to factory settings you will need to reconfigure your device just like when you set it up for the first time.
The full video on how to configure it again is here: