Hi,
First up I would be removing the battery and checking voltage readings with multi meter.
If you find that the battery has full voltage reading, as opposed to the 0% your getting - then you may need to research battery calibration online for your device.
If you have low voltage reading on the battery, then I would check power supply at the cable end and the plug pack first (it’s not uncommon for plug packs to go faulty), then check supply at battery charge tabs on the laptop.
If you have full voltage to laptop battery charge tabs then it is possible that either the battery is a dud or requires activation.
Hope this helps