Gift Voucher redeemed

I return clothes at legit braamfontein and the give me voucher ,so today I went to edgards mall of the south the show me the voucher already redeem amd no history on the voucher no, I was concerned the day I get the gift voucher the ladie call by the way andiswa wanted to help n the other ladie was talking venda at the store she was giving very bad attitude no one wanted to assist me the tell me that the don't have any ideas with payflex she never trained to used it , kindly assist because I don't know what happen to the voucher I received.