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First, it is really careless when you have that big amount of BTC (4 BTC, really) and you do not take care of the password that is considered very crucially in this case. It can be lessons for you later and whoever that saving all important data must be careful, for example, the Private key, mnemonic phrase, password, and other important data. Never show it to the others even your friends, and also must have a backup of those crucial data in order to save your assets, especially the worthy one.
Second, related to recovery BIP38 Password, there are some video tutorials that you can find out on YouTube. You can check for them likely:
https://www.youtube.com/watch?v=EF3iGEg9AvYAs what some members have thought above, you can contact
https://www.walletrecoveryservices.com/contact/ and pay attention to the requirement that they need to get it.
You may also read some similar experiences of losing the password so that you may have additional solution and opinion from the.
https://bitcoin.stackexchange.com/questions/62001/lost-password-to-bip38-encrypted-private-key-encrypter-may-be-faulty-bippy