How to restore iCloud account?

Hello, I am addressing you with a request to recover my iCloun account, I forgot the new code I entered a few days ago, if you can help me change it and restore the account. the sister used an account on her iphone 6s and had her phone unlock codes that she can't remember and now i'm blocked. my phone screen is broken and I may have typed something wrong 2 times and now I can't access my account. this is how the code should have read: "acA.sasA $ 1984 # strongest" maybe I have another character by mistake. please let's solve this. thanks in advance

[Re-Titled by Moderator]