Well, we will just lock your village and give you the code so that no one else will access your village. Once we lock, we will remove both the Game Center and Google account so that you can use a new one.
Now you just have to make sure that you have removed the old Game Center ID from your device and login to a new one. We'll give you the code and your village will link to the new one. Later you can use the link a device option and transfer to a new Google account.
Now let me know if I can proceed with locking your village.