cashier swearing

when i wanted to do my account payment end of may the cashier swears at me because i wanted to pay my account with my debit card as well as with cash, I then said to her that it is unacceptable to swear like that where she then ignored me still standing in front of her and not paid as yet, and called the next person to the front< there was only one cashier at that til point at that time i asked the lady next to the till point if i can see the manager, he only pulled up his shoulders when i told him by now i was so furious with them that i walked out and said i will not pay my account until head office will sort it out for my now am almost handed over still no response on any call that i made to resolve this issue to head office nor to any email i have sent to them i think this is absolutely the worst customer service i have ever seen in my life, and i am also working with customer this will for sure not happen in our practice nor at our head office