MacBook Air Hacked

I watched my MacBook HD free space fill up in front of my eyes without touching my computer. Every time I deleted files it kept filling up. Once I realized something was wrong I unplugged battery, modem, and other internal components.

I reconnected battery and turned on computer, only to watch it connect to the internet again. I don’t know how but it was.

Took me creating a user ID with root access to discover there already was a root user doing all sorts of things to my computer. I tracked down that I had 5 actual partitions, tons of duplicate files (several times over) public folders with names of people I knew, user ID with a loop back network access and printer control.

I looked inside my computer. First time ever opening it. I found part of my hard drive serial number was scratched off. The screw was marked up. SOMEONE HAD BEEN IN MY COMPUTER!

So my questions is - Who can help me figure this out? I have left my

computer in pieces ever since for fear of data being deleted. I am locked out of my email accounts. There are emails sent to people I never sent. There are accounts created saved under safari I never created.

Also, I looked at other components and found my battery isn’t even the correct battery supposed to be in my computer.

I took computer to apple one time years ago because my computer said I had a firmware password and I couldn’t access it.

I need someone that will investigate this and not tell me just to wipe it. I need answers!