US Immigration from Kuwait

So originally in our welcome letter the NVC told us to mail our documents to them, so accordingly our attorney mailed them our documents just over a month ago.

Then according to the NVC timeframe website we should have been DQ last week but we got nothing, so I called the NVC to check-up and then they told me that we were supposed to electronically process them and not mail them. I told them that it is not true and we should actually mail them according to the welcome letter and then they were like one second I will go talk to an supervisor. They came back after a while and they said maybe it is non-electronic processing and the supervisor will review it within 6 weeks and inform us! I told her that we should be done 1 week ago according to the NVC website and this is unacceptable, she said that it is usually faster than 6 weeks for supervisor review but couldn't even give me an estimate so I doubt it is true.

What can we do? They told us to mail it in the welcome letter now they have changed their mind??? How so, we have it in writing. Can't we do anything but wait the 6 weeks or even longer.... Please advice me.

Thanks in advance.