I know they have been closed a few days in the past few weeks, so maybe you called when they were closed? I don't know though, some people seem to have no luck calling or emailing, I am not one of them though so I don't know how hard it can be.
. Make sure you are calling when they are open, they are in Eastern time, and you can also email Angela, she has been quite helpful lately to a lot of people.
Have you reviewed their contact page?
Power Hungry Performance - Contact Us
Hope I have helped.