Unity IOS game hacked and uploaded by another developer

Just noticed one of my (not very good!) games has been hacked somehow and uploaded to the Apple Appstore a number of times. Just wonder if anyone else has come across this and if it is a Unity thing or iOS in general?

They must have downloaded the app and resubmitted the ipa under their own name. I doubt they de-compiled the unity project as the game is identical.

My game:
https://itunes.apple.com/gb/app/badminton-games-challenge-2017/id1216676885?mt=8

hacked/fraud version of the games
https://itunes.apple.com/gb/app/supper-cup-badminton-champion/id1252196560?mt=8
https://itunes.apple.com/gb/app/badminton-tournament-legend/id1296161954?mt=8