THIS IS NOT MOJANG'S FAULT. IT IS NOT A BUG, THIS IS ALL MY OWN DOING. I ASK FOR ASSISTANCE.

I just accidentally deleted a survival world that I had spent about 40 hours playing. I have tried getting the world back, but was unsuccessful. I was only trying to copy the world as a backup, but was clicking too fast and not paying attention. I don't know if anyone at Mojang can revive my world, but your "team" is very techsmart, which is why I wrote this. The world is named Haven and is a 60 Mb file. 

Thanks for the effort if you can't restore Haven.