Vendbusiness Mark Stevens, Mr. Klein Vending Machines, never sent machines, never refunded money, scam, rip-off, Internet

Back in December of 2010 I purchased 4 vending machines from Vendbusiness from an ad they had in my local newspaper.  Mark Stevens was the individual to contact me.  Included was 2 locations for my machines. Those 2 locations had already been taken by the time I wired the money 2 days later, conveniently.  It took almost 6 months, but his location service found me one location.  I finally received my first machien. 

  Almost a year to date a second location received it's second machines.  The fact that it took almost 1 year to receive half my order should have been a red flag. 2 weeks later I found a buyer for my other 2 machines.  All the while Mark insisted on problems withe manufacturer, shipping errors, unreceived emails and the such.  Finally after my buyer of the 2 machines had not received his email from me, he pressed charges and a detective brought me in for questioning.  I had to refund my buyer his money as to not receive criminal charges.  

  Mark finally told me that he was just an employee of the company and Mr. Klein would be contacting me to arrange a refund.  All of this is done over text as the company would not ever answer their phone or return my messages.  

  Mr. Kelin agreed to send me a refund and said it would be in the mail.  2 weeks go by and I finally recieved a check (which was sent out "2day mail" as Mr. Klein had informed me) the check was not for the full refund of $5,750 as was agreed upon but only $800.  I deposited the check and it was returned to me from my back account due to his account being closed.  Now I am not sure if Mr. Klein actually exists or not as I was only in correspondence with him through email.