Nandos want to have their Chicken and eat it

I ordered Chicken wings one month ago via the Nandos app. I am still waiting for the delivery. On October 28 or thereabouts I ordered wings via the app and was then told to fetch my order from Nandos Panorama. I dont know this Panorama and I communicated back. As I hadnt received any response I filed a complaint via the website. They did not bother to contact me despite my having put all my details on their complaints form. On November 2, Five days after I complained to them they had not responded. Instead they sent me a silly questionaire asking for information I had already provided: I asked for my money back with interest. They havent bothered to respond. They seem to be very happy keeping a customer's cash despite not having delivered.