iCloud Keychain approval - wrong SMS country code
I'm going around in circles.
I'm trying to setup iCloud Keychain and no matter how I do it, when I get the confirmation message that a code has been sent to my mobile - it's wrong. It says +61 ********** (Australia) when it should say +64******** (New Zealand). I've gone into my iCloud security and Apple ID settings and my mobile number there is correct. I've never setup a phone in Australia so really can't see how this has happened - but the point it it has and I can't get it to change.
My iPhone is a 6, running 8.1.2.
cheers
Hugh
MacBook Pro with Retina display, OS X Yosemite (10.10.1), 2.8 GHz, 16 GB 1600 MHz DDR3