Naaptol Online Shopping — Refund voucher not working - error happening

I have been trying to redeem my refund voucher (ID: NTCVNJ2ADE) on Naaptol for the past one month, but I keep getting the error message: 'Error Occurred, Please Try Again Later.' I have contacted Naaptol customer support multiple times, but they have not resolved my issue. I have followed all the suggested troubleshooting steps, including trying different devices, clearing cache, and waiting for system updates. Despite all this, the issue persists, and my refund is still pending. I request urgent action to process my refund immediately.