Duplicate purchases are often the result of delays between the payment and the transfer of credits. Therefore, it may be possible that users are starting the same payment process twice. If the paid credits are not transferred to your account immediately, please wait five minutes and check if you have received a payment confirmation. In most cases if no payment confirmation has been sent, the payment process has not been started. If a payment confirmation has been sent but you have not received any credits, please get in touch with our customer support team by opening the "Settings" section and tapping the "Support" button.