I was on the brink of having over 400 gems from uncovering 50% of my map when I accidentally hit reload the island. It kicked me back to the beginning and now I have to start over. I was almost to a pirate rank of 200 as well. I've been working on my island for two months now. Annnnddd I'm back to square one again.
I would like a personal message as well as the same ting happened to me on my iPad mini. This is quite annoying. If it can't be fixed, I'll be leaving the game as rebuilding my Island will take me over a month.
Chris is on vacation and sending him PMs won't work. What you can do is write a message to support@rovio.com or to visit rov.io/gamesupport.