You can restore your own firmware by connecting the charger to a computer and resetting the firmware yourself.
https://di2center.com/2019/02/09/how-to-recover-from-a-failed-wireless-firmware-update/
I/They use the term brick to describe an unresponsive system. Whether it is technically bricked is just semantics. Bricking would normally mean there was no way to fix it even if sent back to someone with a special tool, but whatever.