Bad customer service

I went to return an item at lunchtime, there was only one staff member serving when I reached the front she says I need to do my transaction downstairs as there are no supervisors upstairs. I go and queue downstairs and when I again reach the front the staff member says I must go fetch a sticker at security, I refuse as I came in at the door and there was no security to assist me. I told her to call the manager and she says I must go to his office because he won't come out. so I refused then she said she will then serve other customers. I told her I wasn't moving and then she went to the manager's office and came back only after almost 5min. with a sticker. then she proceeds to tell me that I will not get cash back but a cash card and again I say it's not acceptable as I paid with cash. The way customers are treated at that store is unacceptable. And what is worse, it is reflected by the management because when the manager came out to attend to my unhappiness about the refund, he did not even greet or address me, he looked at the staff member then at me and he said, \and why didn't you get a sticker at the door\". Is that the way for a manager to engage a customer."