Vodacom took my money but didn't provide the product

I purchased a Electricity voucher on the new Vodapay app and have not received a voucher code that works. They have sent me two different codes and none of them work. I have talked to 8 customer service agents and a few more so called service experts to resolve this but no luck. My request for a refund has also been ignored. I have spent 3 months waiting to have them resolve this but now that I am not even getting a response anymore, I am posting to all media platforms to warn others. They Keep asking me to send the same information everytime someone new assists me and also ask the same questions despite it being escalated (so the details I guess just does not get captured) one blames the payment app, one blames the codes, one blames vodacom's official app and so it goes back and forth between their departments but no one resolved the issue after 3 months.