Creditcard payments is supported for our primary payment gateway: Paypal. Once you reach Paypal payment system, look for the option to use the Creditcard instead of regular Paypal account.
Note however, if Paypal doesn't work in your country, the Creditcard option is also not available. For that we have a seperate Creditcard payment engine which works with Mollie, a Dutch online payment provider. Their payment gateway works for any Creditcard payment worldwide. Contact us at firstname.lastname@example.org for details.