Why it wont be charged, the battery? The camera cant read any sim card

Hello,

The last time I used my camera when I had snorkeling. The camera suddenly was shut/off. I thought because the battery was flat. I charged the camera but it doesn't want to be charging. I checked my sim card there is no any pictures or videos there. I believe I have some on the memory card. I've tried to charge the camera and replace it with another memory card. However, it doesn't make any changing at all.

Please .. help me, what should I do to make the camera works again.

Thank you