After I purchased several stuff I saw a nice bag i...

After I purchased several stuff I saw a nice bag in the back and asked the cashier to see the bag. A few minutes later I decided I want to buy it and went to another cashier and ask if I could buy it (he saw the bag that I was talking about), in a very cold vibe the cashier told me go back to the end of the line (I must say it feel that he didn't like my accent), after he let me wait in line he come to me and say that he saved this bag to another client and he asked me to give it to him. He didn't apologize for the mistake in any way just looked at me like I'm the one that made the mistake!

I don't understand why he intentionally wasted my time for no reason.
Worst service ever!