Do what? First off, no, FB doesn’t have my CC. If they did and tried to charge something, I would cancel it. If you used FB to send money, they aren’t going to charge it when they aren’t supposed to any more than PayPal does. And again, you just dispute it if they did.
Turn off notifications and walkway if you are done with it. It isn’t that hard.
Or change your name into one of a variety of things and they will shut down your account for you.