Can't change, replace, download realm worlds

My current selected world is the wrong one and when I try to activate the right world it gets stuck in the fetching realm loading screen. When I try to download my realm world with cheats off it turns cheats on for the copy. And when I try to replace my world with another one it will either get stuck in the loading screen or will say it has failed it has been having this problem for around a year for me and is not play able since it's stuck on the wrong world and can't be replaced and is wasting my money thanks.