I went to buy toiletries and then I noticed that they overcharged me I went back and I told the lady that was next to the cashier that I was overcharged

I went to buy toiletries and then I noticed that they overcharged me I went back and I told the lady that was next to the cashier that I was overcharged.they didn't apologize they were cold it was as if I did something wrong by asking for my refund I honestly hate the service the cashiers are giving us they would Converse while the customers are waiting in the queue and they won't even apologize for that The best service you get is at sales floor only!