Once your information is on the dark web, it can't be removed. Some organisations have tried to shut down criminal sites, but fraudsters can be quick to close down one site and open a new one. Criminals can share, sell, and copy information, which is very difficult to stop once the information has been leaked.
Just knowing the information is out there though can empower you to take action. For example, as soon you know a password has been breached you can change it to a stronger one.