You're not alone. I've had ESO Plus ever since game release on Xbox One. I've only ever received crowns on the first renewal without having to fight to get them. Two months in a row now, I've had to contact them through in-game help, wait to get an e-mail back, prove that I bought the game AND that I have ESO Plus (which should be in their records, and says BAD things that it isn't), contact Xbox support, get back with ZOS, etc etc... Took me almost 3 weeks to get my 1500 crowns, and now happening again.
Someone at ZOS needs to get this fixed and give us more for having to work so hard to do THEIR job. We don't have tons of time to just call all over, send/receive e-mail, look stuff up, etc... That's YOUR job ZOS, we pay you monthly, you take care of it, not US!
They are no longer responding when I try to contact customer service, and yet still no crowns. I can't justify throwing $$ at them every month and still have to fight to get what is promised. Unsubbing now. Will sub again if this ever gets resolved. But as I said, they aren't even sending me a confirmation email anymore so IDK what to do?