Extremely rude staff, smug and arrogant

Disgustingly rude staff on duty today, and had the cheek to argue about my order they messed up. Realising they *****ed it up with the ladies order before me and spoke in their language about it while it happened and prior to handing it to me, i told them they did and they flat out denied it. Saw it, heard it and they thought i never knew. Said it twice that my order was messed up, and the man just smugly smiles at me and says no we didnt, repeatedly. I just walked off and left it at what it was, was too hungry and not going to subject myself to their level.