My Manager said that as the two party's mistake is that we have proofs that you see before you reply to confirm but we have only 12 mm size in the system.
We are willing to reduce the price of 35% in the next order
ขออภัยสำหรับเหตุการณ์นี้ด้วยครับ สิ่งผมก็พยายามอธิบายกับผู้จัดการของผมแล้ว
Sorry for this event as well. What I was trying to explain to my manager