Extremely poor service

I am very disappointed how Standard bank handles a simple problem caused by them. On 30-04-2026 I bought a 1voucher via my Standard bank banking app and spoke to different bankers on numerous occasions for a pin to be regenerated or my money to be reversed when I found out the pin I received was invalid. I even made a request for the voucher number to be resend in order for me to try and sort it out with their Thirt-party (1Voucher) but they were also unable to do that, their respond was rather that they will escalate the matter and its now 4 months later and im still waiting.I would like to know what stands me to do in order for this matter to be solved.