Disgusting service

First I walked in to a queue of about 12 customers and to my surprise the restaurant had only one cashier and other tills we unattended and out of frustration I asked for a manager and she attended my query. Immediately two cashier took over the unattended tills and the queue moved faster and I was happy to be served by the cashier by the name of Jonas who was very helpful and friendly and my mind was changed to be positive after having to be in queue of only one cashier on such a busy day. I bought a regular family meal consisting of the following Full uncut chicken, roasted vegetables, nandos salad, wages and mild Spanish. Sadly when my wife was dishing up she asked if I never bought the spinach and I responded I did and she said she can't find the spinach from the pack. I'm so disappointed in today's experience and I have ****** my money by nandos , I paid for spinach but my family had a meal without spinach. I feel ******