Have you tried redeeming the groupon for the money you paid at the merchant? From Groupon's FAQ: What happens if my Groupon's promotional value expires? All i

Have you tried redeeming the groupon for the money you paid at the merchant? From Groupon's FAQ: What happens if my Groupon's promotional value expires? All is not lost! If your Groupon's promotional value expires, you can always redeem it for the amount paid. For more information about expiration dates and voucher values, read our Terms of Sale