Cannot recover password for 15+ year old account..

I changed my passwords while going through a divorce earlier this year and have now lost all access to my yahoo mail account of 15+ years. There is data within it that is critical to me (mostly just personal data, but it is stored no where else). The phone number attached to it is currently in the possession of my ex wife and she simply refuses to help me in any way. I am never prompted with a security question. I am only given the option to recover with my previous email (it was an email address I had with my previous employer of 10 years and no longer exists) or by confirming the number I no longer have access to so a code can be sent to it via text. I am so incredibly frustrated and cannot believe there is not another way to have my password changed and my account recovered.

What, if any, options do I have left at this point? If i could speak with someone at Yahoo I could easily prove this to be my account by just knowing specific information contained within and many other tid bits of information that no one else could possibly know about the history of the account.

The account I'm trying to recover is Bryan322 and I am temporarily using Removed by moderator@yahoo.com until i figure out some way to get my account back.

Can someone.. anyone.. PLEASE HELP?!?!? :_(

Thanks in advance,
-Bryan