Poor Service from KFC Online

I ordered a meal on the 18th December, which was never delivered. They sent me a message saying the driver could not get hold of me, yet no driver tried to contact me. On the sms they sent, they included a contact number which was a digit short, I ended up having to google the number myself. When I called to enquire, they advised me that the reason I never received my delivery is because they did no have drivers, but on the sms they said the driver did get hold of me. Feeling angry and frustrated, I asked for my money back, which I was told will take anything between 7 to 14 days. I disputed that as it was not my fault that the order had to be cancelled. Then a consultant pursuaded me to take a voucher which was gonna be sent to me via sms few minutes after the call. I waited until the next day and there was no sms. I then called back, then a consultant who answered refused to give me her name, she told me straight out that she is not comfortable to give me her name. I asked her about a voucher, but she told me a case was opened, and that I was going to get my money with 2 to 4 working days, but until today, I have not heard from KFC, nor have I got my money back or a voucher. I sent them a feedback citing my disappointment with them, by they never got back to me.