Write to Paypal or phone them if you can, and explain that the seller is in the Phillipines, and that you have been disadvantaged by them, and should not be responsible for OVERSEAS tracked postage or returning the wrong items at your expense since you are not at fault
You also have no way of getting the Sellers address as the case has been archived. On top of which, the seller has not indicated that they want anything back at all - in fact they acknowledge that they sent the wrong items and then refused to assist further and delayed the process until the time frame for opening a case had passed.
