@Paullou
When you signed up to 2FA you were given a recovery code so if you didn't make a note of it then check the email you were also sent.
Help can also be found here on how to turn this off and/or change your number:
https://www.sky.com/help/home/sky-yahoo-mail/two-step-verif/articles/two-step-verification
__________________________________________________________________________________________
If someone has helped you then please click on the LIKES button in their post.
If you need help please provide as much information as you can
