Sorry for the delayed response on this and for the issues you've had with your Google WiFi setup. I know that's quite frustrating to deal with. I just wanted to follow up to see if you were able to get this sorted out or if I can jump in and help you get this worked out. Can you tell me what troubleshooting steps you have taken at this point? You should be able to just set the WiFi network up as if it was a new device set and you can use your old settings (WiFi name and password).
If you're still not getting this to work, please let me know and I'll be happy to help you out here.