Somehow has my details enough to message me but they don't know their own company, expiry, phone number, or name.

"Hi Anonymous,

This is a friendly reminder that your upcoming Business Insurance policy with - will expire in - days. If you still wish to continue with your policy please call us on - .

Thanks, - "

What's worse than spam, incomplete spam xD

Claims to be from bizcover insurance saying that my policy is about to expire. I got a quote from them two years ago and never took it any further.
Probably a scammer.