Just received respond on email from NVC on my question that I sent on August 2.
They received our case from USCIS and are awaiting data entry into system. "As soon as we enter your case into our system, we will send you a case creation notice and instructions. "
This is the email address: NVCINQUIRY@state.gov
You should put your case number in email subject and in body this information:
Petitioner's full name:
Petitioner's date of birth:
Beneficiary's full name:
Beneficiary's date of birth: