Worst customer service ever. Bought a adidas voucher from them for £50 and they gave me a voucher with £0 credit. I did a PayPal case, I was told to close it so they will refund me which was a big mistake because Groupon has played me like a football with about 20 messages or more, it's over a month they have not refunded me. It looks like I've just lost £31.50,Now they say go to adidas, unbelievable. I bought the voucher from them not adidas. Adidas said its got nothing to do with them. Groupon are scammers will take them to trading standards so others don't have a problem like me. Fortunately I have all my correspondence recorded.