My world, which I worked on for HOURS back to back and I even took hours for a single thing just was deleted the day after the nether update PLEASE fix this, I don't want to loose my survival world which I have spent at least 4 times longer on.

It is a world deleting glitch and I lost my world which I was planing to upload online and the time it was deleted I was about 30% done and did things that I have no idea how to do currently and currently I am just, well I guess flabbergasted, also if possible please return this world to me......