Right ear is not working

Hi. Right earbud is not blinking on the cradle. I tryied many times, looking for the right position, etc. Nothing.
Whan I try to use it, is not responding to any command and looks that can not pair, but if I connect the mobile applicaciont and turns music on (Spotify) I can hear music. Nothing more. I algo clean the contacts, etc.
I’m also tryied to update SO again, but the systems says there is not battery.

Don’t know what else to do.