Poor client service from Nandos Tokai

I made use of the Nandos app to make an order for collection at Nandos (Tokai branch). The app indicated that the order would be ready for collection by 18h30. My wife arrived to collect at 18h35 and when making payment was told it would be a few minutes. The order was only ready 35 minutes later. I called Nandos to complain about the service received and was told that the Tokai branch would contact me. Someone called me and didn't really seem to be too interested but said they would look into the matter. I have heard nothing since. Another example of poor client service!!