Bad Food and Bad Customer Service

We were at the Menlyn Mall. We ordered an Asian Rainbow warm bowl and a Mexi warm bowl of food, which was given to us almost frozen and missing rice & cashew nuts and other ingredients. We complained and they told us the was warm, which it wasnt, its was cold. The staff were arrogant. So, I complained via the FB site. I got a response, to tell me the area manager would contact me. Eventually after a week she did, and offered me a voucher. At no point did I ask for one. Anyway she told me it will be left at the store. A week later I visited the store and was told no voucher. I contacted them again on email, Mrs Tucker, the Customer service manager at HQ. She told me someone would contact me. Nandi the area manager emailed me on 20 December and told me the voucher is waiting for me. I was there yesterday and no voucher. So bad.