Rude cashier with blond short her that has no respect for customers

Went to Sasol garage old Pretoria road towards the boulders mall, poured petrol for R280 the petrol attended told me that they won't accept the R10 since it's a bit old, then I came with a solution that they will take the R10 from my card since I wanted to swipe water to drink since I was feeling dehydrated, the cashier started being difficult and being rude towards me making a big deal about the whole issue which was going to be resolved.