Printerpix Did not send me items that I paid for. Lake Mary Florida

I purchased metal prints from Printerpix via Groupon.  In addition to the metal prints, I ordered metal easels that allow the prints to be displayed on a wall.  Printerpix sent me the prints but did not send me the easels that I have paid for.

I have tried numerous times to call them.  Not once in the past few months have I called them and not gotten an error message about the phones being out of service.

After complaining to Groupon, I received an email from Printerpix telling me that my inquiry was being assigned to a special respresentative. After a number of weeks and more attempts to email and phone the company (I even tried their Twitter account), I received an email telling me that my inquiry was being turned over to their "logistics team".  In my emails to them I have been sending them copies of the "picking list" (packing list?) and invoice which shows that I paid for items and these items were not included in my shipment.  Their emails to me are obviously nothing more than stall tactics.

I placed my order in early December.  It is now mid-February and I have not heard from anyone in weeks.  I still have not received the items I paid them for.  

I wish I had researched this company and read online reviews before placing my order.  There are plenty of reviews online warning against this company. I wrongly trusted Groupon to do business with trustworthy, reputable merchants.