Forgot apple id and no acces to phone number
My sister accidentally entered the wrong passcode multiple times on her iPhone, resulting in a message that said "iPhone Unavailable." She then gave me the phone to help resolve the issue. I followed a tutorial on YouTube, connected the phone to my computer, put the phone into recovery mode, and clicked "Restore" in iTunes, followed by "Restore and Update."
After the phone booted up, all data was erased, which she did not want since she had important apps like Revolut and other banking applications on the phone. Then, the Activation Lock screen appeared, and she couldn't remember the Apple ID as her ex-boyfriend had created it for her. He had only given her the password to use.
I saw an option to unlock with the passcode and asked her for it. She provided a couple of possibilities, but they were incorrect. When she finally remembered the correct passcode, the option was no longer available due to too many wrong attempts.
Now, the account is locked, and we need to reset the password. When we enter the email on iforgot.apple.com, it asks to confirm a phone number ending in 57. We have searched through old contacts and call logs but cannot identify this number. The only clue we have is an old SMS from Apple on her old phone from May 23, 2023, when she bought the phone.
We would appreciate any assistance you can provide to resolve this issue.