Realms subscription supposed to be expired

Hi there so this realm that i have that expired yesterday suddenly came back online im able to join it normally. This shouldn't be happening because i stopped the renew on that realm a couple of days ago and i checked and i wasn't charged for anything I closed the realm to stop people from joining it. it just says 0 days remaining and i'm unable to delete it. I also bought a new realm 2 days ago maybe it has something to do with that? placed on private might be exploited by others.