Here is a video posted by an user seemingly intended for DJI Support. It shows that he cannot power on the Osmo. He then shows it does not seem to charge. Finally he shows that there seems to be damage to the contact pins on the charger..
One oddity I notices in the video is the user seemingly not knowing how to remove the battery ( see at 44 seconds ). There is one hell of a crunching noise. I would not at all be surprised if the damage to the pins was user caused..