Mica Ruimsig closes before they advertise

I arrived at Mica with only 5 minutes to spare before their advertised closing time. When i went to their entrance, they were closing the doors and told me to go to the exit gate where the manager just advised me that they had already cashed up without even having the courtesy to get off his chair to speak to me. What a waste of time rushing to a store that doesn't care what customer service is about!! Pete