Same problem!
I have 18 word PASSWORD RECOVERY MNEMONIC which is NOT a SEED PHRASE
I also have my user name and password from old blockchain.info
The email address is completely lost.
I also have a wallet address which probably does nothing!
18 word PASSWORD RECOVERY MNEMONIC converts to my password that I already know by using
https://login.blockchain.com/wallet/forgot-password (by the way this link recovers only the password and NOT WALLET ID)
Still trying to find a solution to recover the wallet or wallet-id!
If your passphrase is old enough, it doesn't include the wallet id, only the password. The only way to recover the wallet id is if you have any old emails from blockchain.info or if you saved it somewhere.