寫給誰啊? Visa officer? Dear Sir/Mandam? Immigration Officer?
找到那個contact us網頁了,
"If you contacted the National Customer Service Center with a case-related inquiry and more than 30 days have passed and you have not received a response"
還是需要等30天. 這30天估計還是指你沒受到notice, 要不然還是90天了.