If you need to update your billing information, you can do this easily by logging into your Business Hub here.
Next, click on the area that shows your name and select Billing Details.
After that, you'll be prompted to the screen below
Now, enter your payment information in the boxes provided.
When you're finished, click the Confirm button.
Ta-da! Your payment details will be updated automatically.
Has a payment failed? You can also manually retry the attempt in this section. Click here for a guide on paying your invoice