You probably wont be unbanned, but I dont play the game so I'm not sure how the systems work.
Also since a newly Discussions section was just added I'll move your thread there, since it was just recently added you'll be excused.
The very simple way of getting unbanned is being honest, wait 6 months and then appeal. Don't beg and be legit on why you did it. I may release a tool that patches osu!'s values (Disk Sig etc) to make it think it's on a different PC, but I am not quite sure on that.