Bad service

Yesterday I was at Ackermans in wonderpark the service was poor, the cashier by the name of Lethabo she was chit chatting with her co-workers while assisting I was not given a full attention, she was busy complaining that she is tired as If she is doing me a favor, on my items I also bought hair piece so I don't know what was wrong with the code because she did not see it on the system so the colleague told her to go and check the other one on the shelve it might scan to my surprise she wanted to send me there because she is tired I refused and I Became angry she went there when she comes back she was giving me an attitude because I refused to go back on the shelves. So m confused if the bar code doesn't scan is that my problem as a client? Do I have to run around the store to get an item that will scan while the cashier is the waiting for a client to do her her job.?i need an apology from that store Ackermans wonderpark because I always buy there it was the first time I experience that hell of a service