Don't cry.. As long as you see "refund" transaction showing on your accont, it shoudl be fine. I guess the seller refund $ into your credit card no matter US or TW cards...
Since it shows transfer to credit card, it should credit back already..
If you don't mind..you can show me the link of your paypal account, then I can tell...
Wish this will help...
email me if you need any other help about Paypal.