bad service

Went the to buy hot wings on my lunch and the lady was so rude when I paid my bill I mistaken put one number of pin wrong and the transaction was cancel and I apologised to her she responded by saying what ever u work for the bank you should know this machine and she immediately called another client without me finishing to order and when I told her you don't treat customer like that's u ask me if its that all and she just didn't apologised and she just said what ever bad service ever