realm deleted/reset

Hi! Problem: when logging in yesterday my realm seemed to be deleted or it has been reset. I loaded down an older copy of the realm, checked if everything is ok with it (it is) and then tried to upload the file to replace the broken realm. But it doesn´t work. Realms refuses the upload saying there would be no space available for the file. Subscription was recently renewed so this cannot be the reason. Any possible solutions? Thanks for your help!