Get on the 4chan IRC and pester some mod to unblock your IP
Some dumb faggot got rangebanned because he's a cunt
They can unblock your IP specifically and you'll be able to post, but not if you reset your IP again.
That didn't work, but I sent a feedback to explain the situation to wheover reads those
Now I can't post only on /vg/, for some reason, but at least it's an improvement