Couldn'T transfer a world to realm

Hey there. I'm really pissed off, because i couldn't transfer my world to realm. I've bought realm on Nintendo Switch, because i couldn't buy it on PS4. Now it's done and i couldnt upload my world to Realm. The game says there is no Space for this world. So why i have pay for it? Fix it or i want my money back. I gave you 48 hours, for answering me.