If you did not pay through PayPal, or using your debit/credit card using PayPal's guest checkout, and a store has explained they have issued you a refund then:
A. Your refund should appear within 5-10 days from the date that they issued it to your bank/credit card.
B. Your payment will be reversed after 5-10 days, and the original charge will be removed from your statement.
If you paid through PayPal, you should see a refund in your PayPal account.
For any questions about your refund, please email email@example.com with your order number and any relevant information that you have received in your correspondence with the store owner.