Fabric City Unethical Behaviour

I traveled to Cape Town (40km) especially to make it to Fabric City before closing time. I parked my car across the road at exactly 16:39 hour, at 16:40 hour I was at the door and it was closed already. I looked through and saw people and security. I asked him to please open as I just need one thing. It will only take a minute to get it and pay for it. Their closing time is suppose to be only 16:45 hour. Long story short, even after begging and trying to find a solution that they could perhaps take down my details and arrange for delivery as I won't be able to come back soon. The manager became very rude. I said that I will complain about their attitude. A lady employee started yelling at me and said (amongst other things that was insulting to me): \You people always just threaten but do nothing!"I can't remember all else she said as I was so shocked and overwhelmed"