Have you tried to just leave the Quirkbot plugged in to a computer or a charger for a long period of time? I just wondering if something happened with battery and it got completely depleted. When that happens, the battery needs to charge for at least 8 hours in order to get back to speed.
When have you purchased your Quirkbot and where exactly are you located?
If the charging trick doesn't work let us know and we can arrange a replacement.