Manually charging the outstanding amount wouldn't be something you're able to do from within the admin; however, a Shopify employee can charge your card with our backend tools. Our systems will attempt to charge the card again within three days, so if you're okay with waiting, then no further action would be needed so long as the primary issue with the card has been cleared up. If there are three failed payment attempts, then the store would go into a frozen state, so should the second charge not go through, then we'll want to take a more in-depth look into what error message the bank sent to us.
If you'd rather get this cleared up right away, let me know as I can authenticate your account via email so we can manually charge the pending invoice.
I have sent you an email to verify the store. Please respond to the email with the requested information so I can get this reviewed.