Poor customer service

The till cashier was so rude to me(Randburg branch) he returned my R1 coin after paying saying I should keep it a look for a better one since it looks beautiful like me.. I then asked what were you referring to and what kind of sarcasm are you trying to throw at me I then concluded by saying I must be hired to train him since I'm a trainer and that it is not a right way to address a customer.. He just said he wouldn't be there probably by the next week so I must just keep the training to myself.. WOW