Poor Vodacom service and empty promises

So I have upgraded my contract on 30th September 2021 with Vodacom Online and my packages was for data coming with Dischem Voucher. So after the upgrade was done I was told that I will receive my voucher via an SMS or email in the next 3 to 7 days. Since the 30th I have not received anything or even being notify of delay and I have been calling Vodacom online like 5 times week and they all they have a problem but they have created a service request and the lady who assisted me will call me for feedback so she doesn't call me or even give me a notification. Please help get my voucher or I will hv to terminate this contract since.