We are sorry that you are encountering this issue. Due to the number of users purchasing simultaneously, there is a possibility that your purchase may be delayed.
Kindly wait for an hour, and if the missing purchase does not appear in your account, please contact our Game Support with a copy or screenshot of your Receipt of Purchase.
Please be reminded that the receipts are strictly required to verify your claim, so please do include it in your message for us to process your request quickly. Game Support page: https://alchemistww.zendesk.com/hc/en-us/requests/new