Simply rename the device “malware” at this point.
It wouldn’t make a difference
Hmmm, if only there was some actual malware exploit which would configure "victim" devices so that they would never connect to something of the exact same bluetooth/wifi name ever again.
Then you could pick an improbable name and run a rather spicy honeypot for a while,, until there's no more activity. Then it'd be safe to turn it off and bring the real device online.