BrokerPriceOpinion.com review: non payment on orders completed

I have completed 19 BPO/property inspection reports between November 2011 and February 2013. I have never been paid for any of my work. I have spoken with a few folks at the company who keep telling me they are "behind" in payments and to "please be patient" and they "cannot give me an exact pay timeline".
I am extremely frustrated with this company as they do not honor they payment scheduled as posted on their website.
I would like to be paid for all my outstanding orders.