The 20 word seed phrase is not BIP39 mnemonic seed phrase
I confirm this, and iancoleman.io/bip39 website shows only 18 and 21 length options:
He will need to confirm ownership of the account using an email address and confirmation link. I think, without access to this email, he can't use a connected wallet.
OP, have you tried to access using the android app?
OP, have you tried to access using the android app?
i wrote old email which i don't have access and new recover email address, but It gives me this message "error re-setting up authentication"
Does that email still exist?
If it is someone@hotmail.com the email account might have been deleted since you don't use for a long time. Maybe you can create a new email with the same username (if available) and receive the blockchain.com email.
This might work.