Посмотрите в условия использования: Authorized Payments are Final Your use of the Payment Account Service constitutes your agreement to transfer ITC for any amounts which you authorize us to charge against your Account and, as appropriate, your credit card, debit card, bank account, Alipay account, PayPal account, cashU account, Webmoney account, or any other payment method available on italki.com. Such payments, once authorized, ARE FINAL. No refunds will be given for ITC's purchased. Короче, никак не возвращают.