Complaint Review: Zumu LLC

 I used Zumu to sell a number of my dvds.  All my dvds were excepted and a price of $116. and change was to be sent to me.  This was back in June 2013.  I have not received payment at all, and all e-mail contact has stopped.  They sent out a e-mail in June saying payment for everyone would be delayed.  Then I received e-mails saying paying will be sent by such and such a date, and to date nothing has come.   I know from other reports and reviews I am not the only one. I have contacted the Better Business Bureau, and an attorney (if needed).   At this point they have stopped all together answering "any" e-mails at all.   Is this a possible scam?  I am not sure.