Compromised Device

An imposter has been shadowing my accounts for over a year, I have been forced into studying and applying coding, programming, javascript, kotlin, and many other aspects pretty much on my own. This shadow or "clone" had managed to secure "admin" privilege (work or family IDK) Due to my inexperience and lack of being tech savvy the imposter was able to re-direct my browsing, manipulate the information I viewed, even interfere with and DELETE multiple court based motions, disguise apps, change profile information and settings, and restrict, revoke, even deny me access to some or all of my accounts pretty much whenever they please. Just yesterday I was able to locate, document, reveal, and delete hidden shortcuts and re-routing which grants me far less restricted access to settings or features I wasnt originally aware of. Today I dicovered or more so realized that my "iPhone SE" is labeled as an "android" on most web pages, after briefly searching for what had made this possible I landed on this hypothesis; The imposter installed "ROM" or "RAM" into my device and still has the elevated "admin", "super user". My question is: How Can I remove it or reinstall to default I am constantly being monitored and re-routed, my calls and messages do not make it to actual "support" 7-8 out of 10 times and Its nearly impossible to document or verify as the "admin" also seems to have control over anything in or out of my device. Any insight is greatly appreciated, assistance even more so. I figured I will attempt to make contact in community as I seem to have more control as long as the data isnt going into or out of the device!!??!!??!!