Silkroad Silk Purchase Not Credited After Google Play Payment

I purchased Silk through the in-game store on the Silkroad TR server, but the Silk I paid for has not been credited to my account. Yesterday, I purchased various Silk packages through Google Play from the seller GOSU Online Corporation, spending a total of approximately $6. I received payment confirmation emails for the purchases. For example, the payment with transaction number GPA.3354-2870-3707-80721 appears to have been successfully charged to my account, but when I logged into the game, there was no increase in my Silk balance.

The payments are also clearly shown as completed in my Google Play transaction history, yet the Silk I purchased is still missing from my account. This situation has caused me a financial loss and has also disrupted my plans in the game. So far, I have not received any solution or explanation from in-game support or through any other channel, and I have not initiated any refund process.

I request that the Silk I paid for be credited to my Silkroad TR account in full as soon as possible. If the purchased Silk cannot be credited to my account, I request a full refund of the total amount I paid.