Lack of service and management responsibility

Again, this is a food outlet a frequent often and have always enjoyed it, but last week Thursday I was there to have a meal and coffee which is the usual, only this time it took over fifty minutes to receive our food (two of us). They were extremely busy and could not keep up, so I guess understaffed. This was the worst service I have had at a food outlet and I really felt for the staff who had to face the customers and knowing they just could not cope. What really got to me was that one of the managers was there and just left ! He should have been talking to the customers and assisting with the customer queue and relationship, but just left his staff and went. This lack of management responsibility is a sure way of adversely impacting your business.