No delivery and no response from Groupon

Have had some bad dealings with Groupon before, and again now. Placed an order on the 11th of Mar 15, delivery promised withing 3 weeks. My first email was answered with a snotty response saying they still had a couple of days to deliver. Once those days passed I mailed again and was told they would check with the supplier. Since then, I have sent 3 emails that have remained unanswered and I have yet to receive my parcel. Exactly the same issue I had with them a while back. The bad service groupon delivers is clearly evident in the fact that they don't provide a phone number to call them on. I want my parcel that has been paid for and then I am done with Groupon forever.