vouchers used

Hello Peter, I bought a voucher of R500 for my friend who was getting married as a gift on the 25th of November 2022. on the 16th Dec she find out that the voucher was used when in the shop. I called Mr.Price Kolonnade as I was in Limpopo to advise them and they say I should send a mail for them to assist. am e-mail was send to them it was never responded to. on Saturday the 28th of Jan 2023 I went to the outlet and i was promised to get a response by Monday the 30th and today I follow up they promised to call me soon . it was this morning until now they have not come back to me. apparently the voucher was used 2 days after I bought it in hammanskraal only their employees could have used that as the voucher was in Limpopo . I need my money back, i do not need their voucher anymore.