Can't do 2 step verification because the number I used is dead

[Guest KIRK B.OMOTONG]

So I just restarted my laptop because it's lagging but them my accounts got restarted too? Like my school account was already signed in in my browser to make it easier for me because it needs 2 step verification and the number I used was old and gone now so I can't sign in anywhere but in my laptop. Yet, just now my accounts needs to be signed in and it needs 2 step verification and I don't know what to do

 

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