No system of dealing with customers

I went to MTN to do a sim swap. There were three consultants who each had one customer. I was the only other customer. I did not see any queue so I just stood behind the customer at the second counter. The security taps my shoulder and tells me there's a queue at counter 3 so I moved over. I joined counter 3 and when it was my turn to be served the consultant tells me that that's the express till for airtime only so I need to join counter 2. I return to counter 2. When it was my turn to be served the consultant leaves his desk and goes somewhere to assist a customer. I'm left standing alone not sure what to do. Another lady comes along and takes his place. She spends about 5 minutes logging into the PC and then starts calling for people who want to purchase airtime. I'm standing there completely surprised, thinking is this woman seriously calling for people who want to buy airtime when 1). There is an express till which supposedly is just for airtime and 2). I had been standing there for almost 15 minutes and she overlooks me like I'm invisible. I walked out of the store<br> <br> I know the store will not remember me or what happened but this is just a complaint about their awful service.