Commiserations on your plight. You have been through a lot, already.
Re: Question: Is there any way to escalate a problem to anyone at Apple who can help?
We are all Apple users, like yourself, in this community, so we don't have access to those at Apple.
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Re: Any help would be truly appreciated!
Sorry there's not a lot, (other than "how to": info from Apple Support), that we can contribute:
Eg: Contact Apple for help with Apple ID account security – Apple Support
What to do: If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support
What to do: If you think your Apple ID has been compromised - Apple Support
Apple support do have various other articles online:
If you wish:
You might want to browse through any that seem to offer a glimmer of a possibility, that you haven't tried:
More on Security
How to: Report a security or privacy vulnerability – Apple Support
Change or remove the payment cards that you use with Apple Pay - Apple Support
Get help with security issues – Apple Support
Security and your Apple ID – Apple Support
Apple ID security overview – Apple Support
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Personal Safety
Personal Safety User Guide – Apple Support
(NB: There is a link to "Table of contents" at the top, to view topics, leading to detailed articles.
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Apple ID account access:
Wondering if there is any way you could get into your Apple ID account, and change the access to it
:
Eg: How to: Get a verification code and sign in with two-factor authentication - Apple Support
If your Apple ID is locked or disabled - Apple Support
How to: Check your Apple ID device list to see where you're signed in - Apple Support
Recover your "forgotten" Apple ID online: https://iforgot.apple.com/password/verify/appleid#
More info: If you forgot your Apple ID email address or phone number - Apple Support
What to do: If you forgot your Apple ID password – Apple Support
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About the "Recovery key"
Scroll to see how to use one, if you had set up a recover key:
How to generate a recovery key - Apple Support
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Account Recovery process
Learn more about using account recovery instead of a recovery key.
How to use account recovery when you can’t reset your Apple ID password – Apple Support
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Apple Support:
Apple ID Support Team Web-Page:
NB: There is a "Get support" link at the bottom
Apple ID — Official Apple Support
Contact - How to Contact Us - Apple
See a list of Apple phone numbers around the world
Contact Apple for support and service - Apple Support
All the best :-)