I would suggest call USCIS, see whats going on then call NVC again.
USCIS is 1-800-375-5283
To speak with human prompt shortcuts: 1 --> 2 --> 4 --> 0
NVC: 603-334-0700
Prompt: 1 --> 5 and wait
QUOTE(sjmartins @ May 9 2007, 05:41 PM)

Hi,
I have had my NOA2 on 24th april but NVC states have not received case, my receipt number on NOA 2 was the same as NOA1 is this correct