I think Facebook messenger is hacked on iPhone 14

So about a month ago, someone got access to my bank card (right after I got an Amazon prime account. Then this happened shortly after…

I clicked on a friends message in fb messenger to send one back and the picture changed and completely was not him got a Dustin m., can’t delete can’t do anything but watch my data get abused. Can’t find anything they did but changed a few settings that I caught and changed back and my diagnostics won’t open I keep getting errors. Top it off my home security camera keeps looking like a Tim Burton movie with all the weird laughing skulls instead of Christmas lights and demon looking faces in every frame. So I know someone is messing with me. Please tell me how to get this *** out of my phone would it would be a Christmas miracle. I have avast and avast one still have them in my phone.

[Re-Titled by Moderator]