Switching to AOS when CP interview is already scheduled?

[ericf 0]

Dear all,

I'm in a bit of a conundrum here. I started I-130 (petitioner - father) 2006 when i was living abroad and then in 2007 moved to the U.S. to start a PhD. I guess given that i was living abroad when this was filed, the Consular Processing (CP) was automatically chosen. My priority date is 02JUN2006 (current as of July 17, 2013). In 2009, I had the petition approved and had to file some more papers. However, when I tried to switch to AOS at that time, I was told that I had to wait till my date becomes current.

On June 28, 2013, I got an email out of the blue from NVC saying that I already have an appointment scheduled end of August at a Cd. Juarez embassy (my date wasn't even current at that time). I'm currently processing H1B and I will be working at that time (California) and don't have time or money to attend that appointment. I was (and still am) wondering how I can switch from CP to AOS?

USCIS phone line is no help and says to contact the embassy. The embassy in its emails tells me to contact USCIS, while NVC tells me to contact both USCIS and the embassy.

Would greatly appreciate any insight,

ericf