Sticking service

Today I went to Shoprite Rustenburg NWP*** I was serve by the lady called Dorothy Molelo I bought two sparkling water and ask for cash back of R20 which the R10 must be two R5 because I want to give to the guy outside who was looking after my car you know what she said to me she can't help with R5 she is going to struggle with change during the day I was so shock when I try to explain she ignored me and went to the next customer sies what a sticking service I was so disgusted and regretted why I went there in the first place