According to Spotify, to recieve the personal stats email, you needed to have your notifications already turned on before they sent out the email on Dec 12. They are unable to resend the email for some bizarre reason.
It actually had to be on before Dec. 2nd. I went to the trouble of contacting the help account on Twitter and that's what they told me.
Of course I had it on long before then, am on premium and still haven't got my email yet. And yes, as you note, when I asked they say the emails can't be resent. Such bullshit.