Firstly, the BEST way is to buy a new SSD and install it into your Motherboard (TAKE THE OLD BLACKLISTED SSD OUT!!)
Then you clean install Windows using a new USB (One you didn't have in the PC at the time you got banned. 9/10 times Fortnite/Epic will just ban the SSD epic is installed on so yeah.)

Alternative method is finding a way to Spoof you HWID (There's a lot out there don't trust anyone saying they got something. Search on your own for reliable sources. Along side this you will need a Cleaner to delete Epic's tracer files that tracks your PC. So you'd clean these tracers then spoof your Hardware and you should be good to go. Keep in mind when you reset your pc you will need to re-spoof.

I've also noticed (On rare occasions) waiting 7-30 days without logging in at all works. I waited 9 days then tried without new hardware / spoofing my HWID and I was good to play again. Hope this helps good luck everyone.