Post Decision activity status

My post Decision activity says:

On May 8, 2014, we mailed a notice to you reaffirming the approval of this case and returned the case to the Department of State for visa processing. For more information, please contact them directly.


So can you me help me on following queries.


1.As said in the status: USCIS mailed a case to us. But my employer says, still they have not received the case. Generally, how long  it will take to receive the case. It is more than 25 days since I got my post decision status was updated.  


2. And also said in the status,please contact them for more information. Can I contact them for mailing status? and to whom I should contact? where would we get the contact info?


3. And also, what would next step after the case was received.

Its would take few days to get the original petition. Once recieved you will have to schedule an appointment for inteview at consolate. You would be able to travel in Oct 2014 once your visa is approved.