Minecraft worlds dissapearing from account KillerCullen7

I had two copies of the same world. I got slain by my friend and only a few items dropped from my inventory, so I deleted that save and created a new copy of the backup version. I renamed the new copy to the original world I had just deleted, and it spawned me in the same seed and completely reset all chunks. As well as deleting the other copy I had for backup. Please help me retrieve my world😅 It’s name is Slimy Slime, and it’s most definitely the greatest world I’ve created so far. Also, it’s associated with my Xbox account KillerCullen7. Thank you!