Realms won't upload, close, or change the worlds.

My realm will not close, open, or even change the worlds after trying to load a comand block with a very long code inside. I was able to join a few times after being kicked, but as more time passed I am no longer able to do anything to my realm without either it not working or just not responding (EX: closing the realm shows the closing screen but after two hours, never closed).