KFC not refunding our money

I made a purchase to KFC on the vodapay app on the 3rd of aJuly. KFC Elardus Park cancelled my order giving reasons that they do not have drivers. I was promised that my money will be reversed but till this date it has not been. I then contacted the Vodapay customer care on the 14th of August who then contacted KFCs customer service on my behalf. I was then promised to be given a voucher which again has not been sent. How can it take over a month to refund your customers and even when I follow up on the promise voucher, they are still taking their time to refund me. They keep sending me the same email response that I should give them the information regarding this event and I’m stating to believe that this is an automated response