how can I get credit--by cc, paypal?

Usually we credit your original method of payment.
If you pay the order by credit card, we can credit back to your credit card. If you pay by paypal, we can credit back to your paypal account within 60 days from the day you made payment. Longer than 60 days, the paypal payment will become unoperated. We will either confirm your paypal account email to send paypal money to you or request a mailing address send a check to you.
It may take a few days for the amount to reflect on your credit card or paypal account, since our accounting department will need time to do the paper work and the transaction takes time too.