First of all, from my past experience most likely Blockchain will never help in your case. Usually, they even don't help those who have a normal issue, regarding password recovery, they don't have these features. Anyway, if you have a wallet identifier and email address then still there is hope for you. I am assuming you have access to your blockchain wallet. You may download it by a command. Then brute forces your password by BTC to recover. See the below video to see the processor, hope you will find a solution.
Here is the video: Brute force blockchain wallet by btcrecover.

This video for learning purposes, as far as I know, that guy makes the true video. Just try it yourself, don't trust any third party. Most likely many scammers would PM you to recover your wallet. Don't hand over your wallet credentials to scammers. Ask them to discuss everything here on this thread.

Otherwise, if you think the process is complicated, then you may hire this person, Bitcoin Wallet Recovery Services - for forgotten wallet password. He is looking trusted on the forum and has a few positive reviews. But still, I will encourage you to decrypt it by yourself which is safer.