No capable of sorting out errors

I bought vouchers on the momentum app on Sunday 09/02/2025. I went to the Shoprite to redeem them and when they tried to load them it said Already burned. A Incident was logged, but the feedback said it was already redeemed. I have been trying to get feedback on this the whole week and when I was told it is resolved I went back to the store just to find it is saying the same thing. Momentum keeps saying the vouchers if fine and Shoprite said it is not. This is a embarrassment and I am the one driving up and down. I wanted to sponsor these vouchers to someone, but now I am out of 10000 rand and no one can help me. I will rather not buy anything on this store again