How do I address fraudulent theft charges and doxxing on my iPhone?

Sounds like you have been a victim of phishing and inadvertently gave out your personal/financial information. Nobody has remote access to your phone, but they can certainly access your account when that information given to them when you think you are replying to a legitimate message/email or phone call.

Recognize and avoid social engineering schemes including phishing messages, phony support calls, and other scams - Apple Support

Doxxing is an attempt to extort funds by threatening to post personal and financial information. Here’s a description from UC Berkeley.

”What is Doxxing?

Doxxing refers to the collection of a user’s private information, across multiple platforms (including social media) by an unauthorized individual, who then publishes the information in an attempt to shame or embarrass the user. Doxxing may be conducted by researching public databases, hacking, or through social engineering. The term "doxxing" is derived from the phrase "dropping dox (documents)". 

“Doxxing often involves hackers attempting to embarrass or shame individuals by publishing confidential information, images or videos obtained from their personal accounts. Initially, doxxing was used by hackers to "out" the identities of fellow bad actors/hackers. However, more recently, it has been used to attack users with opposing viewpoints.”

The article goes on to talk about how to protect oneself and their personal information etc.

https://oercs.berkeley.edu/privacy/privacy-resources/protect-yourself-doxxing

Racacono wrote:

I purposely avoided giving examples.

Then you have the solutions here for assistance with the information that has been provided. I suggest reviewing the link for help with recognizing phishing scams. One simple rule that is easy to follow is NEVER call a number or click a link in an email or message and provide personal information.

Great advice from Jim, and here’s the link I posted that has numerous ways of preventing doxxing. It’s definitely worth the time to review the numerous suggestions.

https://oercs.berkeley.edu/privacy/privacy-resources/protect-yourself-doxxing

No idea what you're ranting about.

Please read this article: Writing an effective Apple Support Communities question

I know what doxxing is. Unfortunately, the original post is basically nothing but a paranoid rant with no actual information provided.