Did you ever claim your device?
Doesn’t even seem like you have a stats page.
PiAware - build your own ADS-B ground station for integration with FlightAware - FlightAware
So … you haven’t tried everything what i suggested because that would include checking the logs on the RPi.
Just say you don’t know what the commands mean …
Anyhow in case you want to have a look at the logs, the commands need to be entered on the console, either locally by connecting a monitor and keyboard or much better due to copy and paste via SSH.
SSH is used like this: For Beginners - How-to SSH to RPi - Setup Putty in Windows
But i presume you’ll just reimage.
You really should be able to find the feeder id on the stats page … have a second look …
