ordered items, never received it. No response

Bought 2 google diy 3D glasses from Groupon on 13/05/2015 and never received it. I emailed them, but they never responded. I phoned them on 15/06/2015, and they said they will look into the situation and call me back immediately, that also never happened. How do I go about this? This is absolutely poor service, and *****. Do I lose my money? Refund? I work hard to make a living, how can they ***** from people so openly? <br> <br> A warning to all Groupon clients, don't buy from them. They **** you out of your money and it looks like you won't be able to do anything about it. Damn ugly and unacceptable f#cking service.