Unhappy cashier with poor customer service

Good afternoon Today I went to dube debonairs to get a pizza, since lockdown I didn't eat pizza, i went inside to place an order ,i greeted the cashier, she didn't respond back, i ask to place an order, she picked up the scanner for screening and ask me to come close, i ask her to screen on my neck, she said to me cause i ask you to come close you just stand there! I get cross and ask her why are you so angry with me, what's wrong, she never reply, i gave her 200 for payment, she said to me i don't have a change! I just walk away saying nothing cause I was asking myself what i have done to this lady.