Apple Watch S7 not booting

Hi, I had my Apple Watch Series 7 factory reset and it suddenly died while charging.

Now when I press the digital crown, it would only show the Apple logo and would seem that it is booting but would suddenly die again and never wake up.

I tried to hard reset it using the digital crown + side button combination but it would not work. I tried turning it on using the side button but it won’t turn on.

It would seem to be on loop boot whenever i put it on the charger but a hard reset does not work too.

Does anyone know what’s wrong with it?