V-UP Voucher Keeps Declining

I received a reward voucher upon completing the V-UP Achiever Goals. I received a free Monster Energy drink to redeem at a Pick 'N Pay store. I received the voucher on 9 July via SMS, and it is also available on my Vodapay app. Since 10 July, I have been trying to redeem the voucher at the Baywest Pick 'n Pay store in Gqeberha for several days, but the cashiers keep telling me that the voucher is declined. I tried to contact support via the Vodaypay app on 14 July, and the lady suggested that I try to redeem at another store. I tried to do so the following day on 15 July, but the cashier told me it was still declined. I have continued to contact support via the Vodapay app, but I still have not received assistance, and I am unsatisfied, as there is still no resolution. That's the reason I'm complaining on Hello Peter! I was also told that the support agents would contact me, but I have not received any phone calls from them.

My voucher, as it currently stands on the Vodapay app, expires on 17 July 2025 at 01:59. I want assistance in having this resolved and to have a new voucher reissued if possible as the casiers tried everything and I tried to have the voucher resend by SMS but nothing works.