Go to the Cards section
Select a card from the list.
Open the card details.

Click Block.
Confirm the action.
After the card is blocked, new payments made with the card will be declined.
Open the blocked card details.
Click Activate card.
Confirm the action.
After the card is reactivated, the card can be used for payments again.
Please note:
Appropriate permissions may be required to block or unblock a card. If the action is unavailable, contact your company administrator.