Hi,

I would suggest you rescue the memory card, remove batteries and leave overnight.

Try loading things back up and try again.

If you still get no response, I'm afraid there is likely a serious fault internally.
I have taken a few modern cameras apart for repair - but they are VERY difficult to repair without test rigs and a current manual.

What is likely to have happened is that a heavy component has become dislodged from a control board - fracturing the printed circuit tracks. You really need a microscope to even see this - or a test rig.

If it is a new camera - return for repair - which will mean replacing defective boards untill it works.