Cancelled orders are automatically refunded and the funds will be back in your account within 3-5 business days, depending on your bank.
Sometimes orders are cancelled before we have captured your funds, which means that your bank will hold the transaction in a pending status before it drops back into your account. In these situations the funds won't show up as a refund, but rather the original charge will disappear entirely off your statement within 2-10 business days.
PayPal transactions are refunded through PayPal and are subject to PayPal's processing times. You will receive an email from PayPal when your refund has been processed.