I send email to atleast once in a month, they replying with the same email since two years .
This case is documentarily complete, which means the NVC has all the documents we requested. Your application is waiting for an interview appointment, where a consular officer will adjudicate it.
The U.S. Embassy or Consulate provides the National Visa Center (NVC) with a list of available appointment dates and times. We will schedule your case for an interview appointment when an appointment date is available. We schedule appointments on a first in, first out basis. After we schedule your appointment, we will forward your case to the U.S. Embassy or Consulate General in ISLAMABAD
We cannot predict how long it will take to schedule your appointment, but we will notify the applicant, the petitioner, and your attorney (if applicable) when an appointment is scheduled. Your case will stay at NVC until that time.
For the most up-to-date information about the operating status of the U.S. Embassy or Consulate, please visit their website at https://usembassy.gov.
ISLAMABAD EMBASSY PAKISTAN