Wrong tiles

I am a contractor and I am currently working on a house renovation in Mtubatuba. I am very disappointed with Buco Mtuba as I had ordered 82 boxes and at first they had put in 62 boxes and one of my guys went to check and only then they realised they put in the wrong number of boxes, and as we are working on the house now, we are seeing that they gave us the wrong tiles to fill to make it 82 boxes. This is very frustrating and inconvenient especially because this is clear to see. Buco needs to do better