Disgusted service

So I went to the Lewis Store at Sun Village on a Saturday morning. Their trading hours stipulated that they trade from 8am, but I got there at 8:20am. Their teller walked behind me into their store, as she was late for work but the Manager, Thapelo Dibetswe was seated by the cashiers desk, meaning he had been holding the fort in absentia of the cashier. As I walked to the desk he stood up and left, as the cashier walked towards the desk. I then had to wait for her to restart her computer, as she has just arrived for work. Mind you, I am there, waiting for service, but nah, I had to wait for her, and then after a while, while she was logging in she told me that am going to wait for even longer coz the account that I wanted to pay was not from their store, therefore the other store should export it or something along those lines. Like what kind of service is this? To make matters worse, the Cashier kept laughing when she was telling me all this, which made me more angry coz clearly she doesn't see that I can't be waiting for forever. Why didn't the manager assist me while the late comer restarted the system beats me, clearly they don't value their customers