PART ORDER MISSING AND POOR MANAGEMENT

Yes they were rather busy, however a well-managed restaurant should cope under pressure and yes the manager did apologize - but I need to vent! I knew what I wanted, due to me having the same meal the previous weekend at the Walmer Park(which was outstanding, service) Waiter asked would I like anything to drink, I ordered a beer , he asked am I ready to order. I ordered the same meal as last time. Waiting, minding my own business, a gentleman walks up to my table and sits down