Unable to get my Code for payment on Groupon

Hi. I was trying to purchase Mimmos Gift Acres voucher on Groupon and our internet went down before I receive the code to use for payment and to proceed with my request. When I try again Groupon website is telling me that I have already purchased and also my credit of R 76.50 is being used. Can Groupon please investigate and return my credit and I would like to buy the Mimmos voucher.