I'm struggling to believe you have a dozen new vacuum cleaners in your shed. It's quite an extraordinary claim. Are you willing to share some evidence?
That said, thanks for sharing the emails/headers.
It's curious that Amazon hasn't flagged you for purchasing & reviewing multiple similar items in such a short span of time. I would imagine it would be quite easy to spot someone who's bought and reviewed 12 vacuum cleaners in a 2 or 3 year window.