Humiliation from a BOXER Cashier & Supervisor

on Sunday the 17/11/19 @ 11:00 AM I walked in @Boxer Thabong to buy a few things before I headed to church, I was assisted by a rude cashier by the name of Mantja Nyapotse . after she cashed my stuff I politely asked her to give me a cashback of R100 from my Nedbank account. She gave me the R100 note then before she closed her till I asked she make it R50/R10 & 2 R20's it was like I asked her for the impossible. she rudely told me that the change she had was for "customer's" and she is not allowed to give change. Then I asked asked is it a management order not to give me change I asked for or she simply did not want to. she told me to sign my receipt and leave her till because customer's are waiting. I asked her to speak call her supervisor she told me "go and call her yourself". Eventually the supervisor (with no name tag) arrived she didn't say anything but the cashier went on to tell her side of the story then the supervisor left us. I had to call her back and tell her the ONLY reason I asked for a supervisor was so that my plead can be resolved, still without a word from the supervisor the Teller gave her the R100 note and she proceeded to another till. I was left standing there not knowing who to speak to as the cashier told me to move my stuff that was in her way to enable her to assist customer's. finally the supervisor came back with my money and handed it to me as per my ask. they were both rude and had no customer care etiquette .