Email Authorization Code sent to wireless number that I no longer own.

Hi - need your help. I moved from the USA and now live in the UK. I have a bellsouth.net email address.  I have had it for 15+ years and still use it. A couple of weeks ago when logging into my email, I got a screen prompt to enter my details for the zip and wireless number, then use the authorization code to confirm and access my email. Obviously, I have moved and no longer have the wireless number, I cannot verify and authorize the code. How can I get access to my email? I tried clearing cookies, cache etc. Still nothing. Any help will be greatly appreciated!