Leave the page
Close the tab without clicking anything else on it.
Change your credentials
Through a checked WeTheNorth link, log in and change your password and PIN right away.
Turn on two-factor login
If it was off, enable it now so a stolen password alone is no longer enough.
Check for changes
Review your account settings and messages for anything you did not do yourself.
Leave the fake page, change your password through a checked WeTheNorth link and enable two-factor login.