This is how the email should look in your inbox
When you click to open email this is what it will look like
At the bottom of the page click "pay invoice"
On the menu bar on the left side click "invoices" to view your invoices
select the invoice you want to pay
to pay click the button on bottom to pay
Add your credit card information. You may choose the keep the card on file, you do not have to
If you have a card on file but want to use a different card this is how you would add it