Groupon GROUPON's STARBUCKS Card is not valid! I purchased a Starbucks Gift Card from GROUPON. I went to three different stores thinking that the store was wrong to redeem the gift card for purchase of a coffee. The card was not good. I start making inquiries to Groupon about this endless phone calls  and emails to tell me that I have to contact Starbucks or telling me how to use it. When I called Starbucks, telling them what Groupon has been. They investigated and notice that's the $10 gift card that I purchased for $5 code has been already used and another representative of Starbucks said it was invalid and I was transferred to Groupon Groupon and I got the message saying to contact them via email, call back or chat. Groupon will not refund my $5 or will not replce the $10 gift card... Beware... This promo came from a Groupon sent to me as a gift, it was not on there Groupon website. Internet