Our realms world reset and when I restore a backup it loads up as the reset world still.

On May 18th my friends and I got off the server at around 8 pm. When a friend and I went back on the server at around 11 pm that same night, our world was reset. I tried to restore a backup twice now and both times the world loads up and is the same as when we first created the realm. I downloaded a backup not too long ago and I'm trying to see if that would work but I would prefer if we didn't have to lose so much progress and if there is a way you can give us a closer backup that will work.

 

Edit: The backup I downloaded works but I would prefer if there is a way to get a more recent version we can get so we don't have to reset the progress we have made.