I'm a bit confused as to how I can change my rescue email. Any help would be greatly appreciated.
Go to appleid.apple.com
Underneath where it says 'Already have an account?', there should be a button 'Manage Your Account'. Click this and log in using your usual Apple ID and Password. Click the Tab on the Left Hand Side: 'Password And Security'. If you have set up security questions you will need to ask answer two of these to proceed. Once who have gained access you should see a subheading: 'Rescue Email Address' and under this you will see your current rescue email address and you should have the option to 'edit' or 'delete' it.
Hope this helps