First go to
https://login.blockchain.com/.
then you will be asked to enter your wallet ID (wallet id is at the bottom of the authorization email, check your old email from blockchain.info). if you remember the password, then just enter the password and login. Usually you will receive an email to authorize the login. then you just have to check the email and authorize it.
If you forget the password then click the need help section to perform the recovery by entering 12 words as requested.
After that, follow the procedure. I hope your account can be opened again.