I was purchasing a deal when the request to receive the groupon app appeared, causing me to have to reverse a page to find the payment page. No confirmation had appeared in my mail as to the purchase so I clicked on pay again. I was then charged for two of the same product, two sets of tickets for my wife and I to the same event on the same day. When I explained the clerical error to the service rep, then the escalated rep, I was given an electronic shrug and told that all sales are final. Shameful customer service. Clearly, this is a group that preys on and hopes for errors like this. Good bye Groupon.
Additionally, I had gone to Groupon first as the deal should always be lower than that offered by the retailer. It turns out the deal from the retailer was an equal or better price for several reasons.