Refer to conversation via phone on yesterday , Khun Wannapa informed that the contract had been made at the sales department of the company So, she doesn't have the documents detailed of the contract and the hotel's sales must to contact marketing manager of GTA directly for modify room rate if it be incorrect and the reservation of a specific contractual agreements are the same, no change. The detailed of a contract do not have the change that our sales will contact with sales department of GTA ,if its change . You did not know the detailed of contract and never see it.