Terrible and inhuman treatment customer service

I am very disgusted with the service I got from Telkom branch in Pretoria sammy marks Square. I went there to do a simswap due to have lost a phone and a guy told me to wait outside for the next available agent which I did and I waited for about 30 minutes and after the wait a lady directed me to another guy who then stood up to go to the office without a word to me then the ladies went to check him only to find out that he decided to take his lunch regardless of making us sit on his station, now Sarah called the next person in line even though she saw me being ahead of that person she insisted on assisting the guy which I protested until she agreed to assist me. Sarah told me we must pay R10, I gave her a R20 which I didn't notice that it was torn and taped she said to me "go and look for proper money" I then went to a nearby ATM which could only produce R200 notes I came back gave it to her and she said to "osa nleka tumelo" meaning do not test my patience, she then told me to go out look for change after her colleague also went out of his way to go out and look for change for a lady who works at leqoq spotif who also jumped the line and was offered benefits of working next door. as much as I am not an expert in customer service but I can tell you one thing Sarah has a bad attitude and holds herself higher than the actual Telkom customers and if these are the kind of people employs in their stores and not just Sarah but even the guy who stood up and decided to go on lunch while we were in a que then they are driving customers away, I recently lost my prepaid phone and was actually thinking of enquiring about a possible contract but after being treated like that for asking for a mere simswap I don't think they deserve my or any of my people's business.