Not sure if this will help but you can opt in under notification preferences. If you're not already of course.
Honestly, it's the luck of the draw with this. I've had mine on and I've gotten this theme, but I'll hear of other emails on here that I've never gotten. I still haven't gotten my Bloodborne platinum theme and I got the trophy back in January. I really need to contact Sony about that...
It was cool for like 5 minutes, then got annoying. This one is much better and I'd actually use it beyond the holidays cause of the chill jazz and neon sign. Wish there was one that had just the word playstation without the holiday theme set.