If you have requested a refund for a pre-order and have not received a timely response, please consider filing a complaint with the FTC:
https://www.ftccomplaintassistant.gov/FTC_Wizard.aspx?Lang=en

I found this letter interesting.  BF Labs registration report to the State of Missouri is past due, and they will lose their ability legally to conduct business in the state if it is not filed by May 4th, 2013.  It's the second document on this page:
https://www.sos.mo.gov/BusinessEntity/soskb/Filings.asp?3402461