Bad customer service - Mtn Shop No3 Greenacres Port Elizabeth

This is the worst customer service experience I got from this store today. This is a recent experience which I had occurred. Yesterday I came to the store to make payment. Unfortunately I was told that their systems are off for at the moment, I should rather come back the following back. I did exactly that today. I went to the store, got there at 15h30 sharp. Some supporting technician assisted me with the screening, I was then told to enter. I go inside we were only 3 customers. I waited patiently for more than 30 minutes. An old lady came in and she was assisted before me which I didn’t have a problem with because of her age. I then called one of the sales person in the store trying to find out what’s going on, why is there a delay I’ve been here since 15h30. Then this guy who’s name is Vuyo Ntshebe stormed up and told me to wait they’re busy with other customers. I told him that you should have told me that at first I wouldn’t have reacted like this if I new the situation. So we started exchanging words across the store, that I should count my words when talking to him because he’s a man himself. So I didn’t understand how we even got to that point because in the first place I wasn’t talking to him. So they all stopped working but one lady at the corner and went into a back room and started laughing while waiting for them. I asked to be given a managers number who wasn’t present today, when I got home I called the number but it’s not available on the MTN network.