Change the original linked device to my Apple ios

Recently it was my first time to link my account in iphone 3Gs with android S3 ,but unfortunately I didn't take care of the account I'm linking to it which was my little sister account
Now I wont to delete my data form her account in Google+ and change it with mine because when I tried to link to another device it said "already linked"
P.S. : I'm not just a beginner ,,, I searched in the internet for a way to do this but with no success .. I found someone who said that you can enter your account in google+ and then tab in apps connected to this account and then delete COC from there ... I tried this method and it worked "with deleting" but when I tried to link again same massage appear and when I login from samsung S3 I play the tutorial and then it bring back my old game data
HELP PLEASE ...:confused::confused:

Try adding the Google plus account with the good account linked to it from your device settings. Then re-install CoC and it should do the tutorial. Once the tutorial is completed you should be on a brand new village. Go to the in-game settings and click link with Google+. Then there should be an option allowing you to pick which account to sync with. Select the one with the account you want on it and the game should reload onto the village you like. This always works for me so maybe I'm not understanding your problem if it doesn't work...........:eek::cool:

Once a village is linked to a GC/G+, it's permanent.

so GameloverHD I'm trying here to understand you very well
Are saying that i have to start a new village from the old Google+ account and then I could start linking again with another Google+ account
and the most important thing... are sure that this won't delete my village data from my apple account ??