In case that you have selected to pay via credit card and want to change it or you have primarily selected Paypal and now you want to use your credit card here is what you need to do.
Login to the platform using the radio station's owner profile as to have full access to the Plan & Billing area. Then, go to the section Billing and go to the tab "Billing & Payments". Click on the "Change" button as highlighted in the following screenshot.
The following pop up window will appear.
In this window you will be able to add your credit card info and also see you existing credit cards (in case that you have already used one) or select to use a Paypal account.
The final step is to add the information and click 'SAVE CHANGES'.