I am unable to charge my iPhone XS Max

Hi there

Try this

1. Check your charging cable and USB adapter for signs of damage, like breakage or bent prongs. Don't use damaged accessories.
2. Use a wall power socket and check for firm connections between your charging cable, USB wall adapter, and wall socket or AC power cable, or try a different socket. 
3. Remove any debris from the charging port on the bottom of your device, then plug your charging cable firmly into your device. If the charging port is damaged, your device probably needs service.
4. Let your device charge for half an hour.
5. If your device is still unresponsive, force restart your device: 

• • iPhone 8 or later and iPhone SE (2nd generation): press and quickly release the volume up button. Press and quickly release the volume down button. Press and hold the side button until the Apple logo appears.
  • iPhone 7, iPhone 7 Plus and iPod touch (7th generation): press and hold both the side (or top) button and the volume down button until the Apple logo appears. 
  • iPhone 6s or earlier, iPhone SE (1st generation) and iPod touch (6th generation) or earlier: press and hold both the side (or top) button and the Home button until the Apple logo appears.

1. Let your device charge for another half an hour.
2. If your device still won't turn on or charge, take your device, charging cable and charging adapter to an Apple Store or Apple Authorised Service Provider for evaluation. You can also contact Apple Support.