Customer Service not sending voucher as promised

Upon reporting the problem, I encountered with a packet of sweets I bought at Clicks (Tiger brands' problem), I wrote to Tiger Brands who then responded to my query via email and telephone call. I was promised a replacement voucher which would be sent to me via sms. I notified Tiger Brands that I did not receive the voucher on more than 4 occasions and even gave an alternative cellphone number.

My first encounter with them was 10 May 2024 to date I have not received my voucher and they no longer respond to my emails.