Where do I report bugs found in the iPhone app for this device?

I have discovered a big problem when using two (or more alarms). Setting the first alarm to week days and the second to week-end days, only the first alarm is detected (shown as next alarm in the app) and the bell symbol is not shown on the device's display even though the second alarm is set as active in the app.

I'm considering returning the Wake-up light because if this critical flaw!

I'm using the latest iPhone app version 1.0.2.