Disappointed customer

Good morning, I am so disappointed in the treatment I'm receiving from edgars. I lodged a query 3 times with customer care regarding the purchase I made at edgars wonderpark. I bought clothes and produced the vouchers of 300 and 200 only to find out when I got home and checked the receipt the vouchers where not used and on top of that I was told to pay extra for the purchase. I am being told every time I call that they will attend to my query and get back to me. By then I'm always using my airtime. Maybe you can assist because I'm tired of being told stories