Gen 2 not recognising battery and offline

As of yesterday my doorbell has been offline and wont reconnect to my wifi. When i press the orange reset button there is no white spinning light. We have charged it overnight but now it also says to add battery and that there is no charge. When we plug it in it flashes blue a few times and then nothing. We have tried doing a reset by holding the button 30 seconds and tried different charging cables. Any ideas?