I am not sure if this is helpful, but after I subbed for ESO+ there was a very long delay. I subbed on Jun 9th kick off. I am not sure what the issue was but after less than 48 hours ZOS had it squared away and that was during the madness of the first 3 days of release. I would not be to concerned they will get it to you.
On another note. My friend did log out and clear cache on the XBOX one, then power cycled and signed back in and his Crowns showed up. I cannot say for sure if it was timing or it really helped, but my showed about an hour later and I did not clear cache , but I did log off and quit the game completely and then log back in.