My game doesn't offer the option to switch accounts or link in the settings menu. WTH.
To switch between acct you need to set up the email address your cc account is link to on your device (Phone/tablet). Once you have accomplished this go to CC game and press on switch you should be able to see your other acct. Do the same for your new device. About not having the option for link... You can always download link app, I am not very familiar with it so... Yeah... Hope that works for you! There is always igg, best of luck!