Trying to sign into Yahoo mail online but sending an access code to a mobile that no longer exists.

[baldwinchats20]

I have updated my mobile on my sky account but Yahoo sending access code to wrong number. Asking for a number that I should have set up but can't remember it

[Mark39]

Assuming this is the two step Verification code and you didn't keep a separate note of the Recovery Code, you'll have to call Sky. They can turn off 2 step login for you, but it will take 21 days.