Dollar Tree

Yesterday I was at your store (which I am there almost every week). I was at the register and paid for the 4 items I bought...After I paid and got my receipt and when to grab my bag and it was gone...The cashier and I looked all around, she said I gave you the bag but it was gone...(I THINK THE PERSON BEFORE ME PICKED IT UP BY MISTAKE). The cashier called the manager (which it looked like we were bothering him from the beginning) I told him what happened and he wasn't really listening to me, didn't realy care what I was saying...I then said it again and he said to me 'GO GET YOU ITEM" in a nasty tone....I found him very rude and truly didn't care what was going on or what I was saying....He made me feel that I was annoying him....I do think he should be spoken to but I don't think he really would care....AN ABSOLUTE DISGRACE TREATING CUSTOMERS THAT WAY...ITS DOLLAR STORE REALLY.....THANK YOU.