How can I retrieve a forgotten Game Center account?
I have a Clash of Clans account and I'm playing it for about 2 years. It was level 97 and it's currently in town hall 9. I'm afraid that I will lost my game if my phone gets broken. That's why I want my account to be linked to a different device, but I can't do it because it's asking me to log in first to my Game Center account. How can I retrieve my Game Center account? I just changed my Apple I.D. when Apple updated it's IOS to IOS 8, because it required me to do so. But when I wanted to log in my Game Center account it asks me to log in in my game, but it kept on saying that my game is already attached in another Game Center account. What am I suppose to do? Please help me. I don't want to lost my game that I played for years now.
iPhone 4S, iOS 8.1.2