First I want to say don't handover your account without trusted person. You would able to recover yourself, just need to try and try again.
At first try with your best guesses, probably it would work for you. If it doesn't work then download
wallet.aes.json. Likely you will found it on first email from Blockchain if you have saved it. If not please watch the below video,
You may check this video how to work brute force and download (wallet.aes.json) :
How to recover Blockchain.com walletYou may need btcrecover tolls, you will found here including tutorials:
https://github.com/gurnec/btcrecover/blob/master/TUTORIAL.md#btcrecover-tutorial Hope you will able to recover your fund by yourself.