Unplug from power, wait 10 seconds, plug back into power, wait 10 seconds, touch and hold the top display. Display will turn from white to red (keep your finger holding on the display). You’ll hear a voice prompt “Your HomePod is about to reset, keep holding until you hear 3 beeps”. *beep beep beep*. Let go of the top display. The HomePod should now be factory reset and ready to pair.
I’m all too similar with this 🤦♂️