At this moment, I could only confirm our prepayment amounts (THB4,620,454.42 & THB1,450,278.60) that shown in your statement are correct since we don't have any of your invoices on hand.
Hence, kindly regularly provide us all your invoices to our Operation Team for verification as well as for Finance Team record keeping.
Thank you for your understanding & should you have any queries, just let me know.