Internet Marketing Center Unknown charge on my Bank Account Internet

Last August 15, I saw an unknown charge on my bank account from IMC.  I haven't had any transaction with IMC since May, 2010.  I didn't get any email from them letting me know that they will charge my account.  And so I called the phone #  posted on their website.  It says their office hours are from 8:30-5:30pm Pacific time.  I called but no one answered.  I tried all the extensions but everything is "leave a message".  So I submitted an inquiry online to their support and got an email back assigning me a case no saying someone will get back to me.  That was Aug 16.  Today, Aug 19, I still haven't heard from anyone.  I also left a message with their billing dept and sent a few emails during the week but so far no response.  I also called several times during the week but no one picks up the phone.  This is such bad customer service.  It wasn't like this when Corey Rudl, the founder was still alive.  It seems like everything is via voicemail now. No live person answers the phone anymore except today but she said she cannot help me and it was only after I had asked to talk to her supervisor to let him know what is going on that she decided she was going to send an email to the billing person.