Q: How do I disable SelfControl once it has started?
You can’t.
That’s the idea.
Just wait.
“But, but but…” you say.
Seriously, chill out. It’s not the end of the world.
The timer will run out and the internet will come back again. In the meantime, you may find comfort in curling up in a ball under your desk and rocking back and forth for a while.