My homepod mini has gone mad. It plays apple music radio randomly - even when I'm sleeping!

I need help! My homepod mini has gone completely bonkers. First it started playing music from Apple Music Radio randomly. I didn't even have the app open. Heck, I don't even have a subscription.
So far I've tried these tips I saw online:

- Wiped the top clean
- Open another app and share that audio - I opened Youtube on my phone. Now it starts playing that Youtube video over and over again.
- We don't have pets. It's on a shelf.
- I've reset the homepod mini twice now.

This is the first time it happened. I still want to use it but what do I do?