No service at Mugg & Bean

It seems as if this restaurant is not reacting on any complaint. I visited this Cape town on several occasions. Twice I sat down at the M&B inside the Cape Town Airport. Twice disappointed. There was no service at all. We ordered coffee and after waiting for 45 minutes and several remainders had to leave without coffee. It is amassing that this business still operates. Tried to complain on their website but due to an technical error could not file the complaint.