Ring door bell seems dead

Hello Doorbell has been working fine for a couple of years but suddenly noticed that people are knocking instead of using the doorbell as it's not working. On the app the doorbell looks offline. I charged the battery even though I knew its not the issue. When putting back there is no light coming out of the device and the reset button doesn't do anything either. More strangely is that after a few hours the app is showing the doorbell online even though its not working and again I can't get it to setup mode and there is no light coming out of device. Any suggestions? Thanks