How can I recover my Apple Account if I forgot my old number?

I’ve been trying to recover my old apple id, but my only problem is that I’ve forgotten the number I used because it was one of my family member’s own. And well— I can’t really remember who's number it is from my family, and they do change their numbers frequently due to changing their phones from time to time. Is there any way for me to still recover my old apple id?

[Re-Titled by Moderator]

Original Title: Forgot the old number I used for my apple ID, but I can’t change my trusted number without inputting it even though I’ve FORGOTTEN the old number