Unauthorized remote access on my iPhone 13, iPad 6, Android Phone and Surface Laptop

I know I'm setting myself up for ridicule and insulting responses but I am running out of patience and ideas to try to make my devices somehow useful to me. And please before you comment, unless you experience it you won't believe it is happening... But this is my reality. Yes, I wouldn't think I'm that special either. However, this person seemed to be obsessed with me and keeps a tab of everything I do and even where I go... tracking my every move.

Unfortunately, this person has/had access to my physical devices and manipulated the settings, including my online accounts for personal use.

Long story short, my iPhone settings keep changing right in front of my eyes as I use it. Call logs and text messages would appear and disappear. Call forwarding would be enabled. As I change and update the password and security on my online accounts, my screen changes immediately to a different screen as if it is preventing me to do it and the account will suddenly no longer be on my iPhone. And as I try to log in again, the password, security, and recovery information are no longer valid preventing me to access it. I have tried to get help from the Apple store genius bar but I was just told that NO ONE can hack Apple products and was just insulted and embarrassed in front of other people. One thing that I have noticed is that Siri, shortcuts, customized accessibility commands, and scripts are being utilized. I have tried to disable and erased some of it but it just keeps coming back and automatically runs in the background. Voice commands, keyboard shortcuts, using an overlay to cover up what's on the page, specific settings that are somehow not showing up and can't be found anywhere, and videos being edited to show half part of it just blackout or just simply deleted. The edits were done within minutes of me taking it or upon reviewing it and as soon as I noticed that I captured something I'm not supposed to. I have changed iPhones, Android Phones, Laptops, Sim cards, and carrier services but to no avail. Someone close to me is giving this person access not only to my electronic devices but also to my car and my house which I believe now has listening devices if not a spy camera. I only want recommendations on how to somehow protect my iPhone, enough for me to sign up for a new private and secure online account and conduct transactions that are mine alone. Maybe an app that monitors and logs the activity and system settings/configuration. That can also block the changes that are being made remotely. I have no proof as I don't know how to capture evidence to get this person. Please be kind in your comments and only note what might be helpful and not just opinions. I'm already grateful for whoever takes the time to read this.

Additional facts: my battery overheats fast, my iPhone is so slow, and the wifi/cell just gets disconnected and won't work at times. Contact info for a specific person and mine keeps changing... Landlines would be available for Facetime and mobile numbers won't accept calls or will suddenly show as a Voice or not available with iMessage. My previous number is somehow being used on Skype, Voice, Viber, and iPhone. My devices are showing as running on MAC IOS and/or Apple Watch on the Apple account website. There are no additional devices logged in but one and the name will still be under an old name even after I updated the device name already. Logs that show Voice Memo, Notes, Calendar, and Tasks are being used a lot even though I don't use them. Emails and Social media accounts that seemed to be under my name but have no clue about it. I accidentally logged in to a Google account I didn't know about, but the next day it says that there was no such account... Although, I somehow got the info that it might be a child account. Old accounts I have deleted now are still active but have totally different info and recovery. I'll suddenly see shortcut commands that appear to be based on what I exactly said or do as if I am being recorded. There were incidents before where safari would suddenly open up and every word I say will show in the search bar.