Unable to get info on non delivery of goods

I had used Groupon for purchasing of goods with great success before.<br> Acting on this experience I ordered 2 items from Groupon - 2x Solar LED Outdoor lights.<br> I received an email to confirm 2 tracking numbers<br> I accepted delivery of 1 of the items and contacted Groupon to advise of the omission of the second item the following day (19 May 2015)<br> I have phoned 5x times to advise that the other item is still outstanding and was advised that the matter was escalated to Bianca.<br> Bianca send me a apology mail undertaking to sort it out, but nothing has been resolved.<br> When calling today I have finally been advised to contact the delivery company myself and Groupon simply are washing their hands of me.<br> This has left we with a bitter taste and unwilling to consider using the services of Groupon again.