Follow these steps to change your payment method:
Click on the Settings in the top right
Select Billing & Invoices
3. Scroll down through your billing information to the Payment Methods section and choose either Add Credit Card or PayPal at the bottom of the page
4. For Add Credit Card you will need to enter payment information and for PayPal you will be redirected to the PayPal secure browser
5. Click Save Credit Card or finish the setup with PayPal