Still awaiting Refund

I bought two vacuum cleaners on the 15th of May, the delivery was quite quick, however, one vacuum was defective and both were of poor quality. Definitely not what was on the Picture. I sent back the two vacuums with Courier It. I still have not received any feedback from Groupon regarding my Refund.<br> <br> I have bought many Groupons in the past but never had this problem before. Very Disappointing.