Dollar General complaint: Rude!!! Over 2 pennies!!

I went in on 8312021. I paid cash. I tried to give best exact change as possible. Total was 7.58, I paid 10.60. When I was given money back I was shortchanged 2cents. I told the cashier he owed me 2 pennies. He makes a loud sigh…. turns and grabs some keys behind him and opens the register. He puts pennies on the counter.
No thank you.
No I’m sorry.
No have a nice day.
As he walks away I told myself he was the rudest person I’ve seen in a while. Not because of what he said but by his body motions. As he’s walking to the back of the store, 8 feet from me, I ask him for his name. He ignores me. I ask him again louder. He’s now 14 feet from me. He turns and says What? I say, what is your name? He says, my name? I said, yes, what is your name? He turns around and mumbles it doesn’t matter what his name is. I proceed to follow him at fast pace figuring he was gonna try to hid in store room and I knew I couldn’t go back there. So I catch up to him and ask him again for his name. He turns around and I tried to read his name on his tag which DID NOT have a name. I tell him he doesn’t want to tell me his name because he knows I’m going to complain about him. He says nothing.
I tell him he doesn’t have to tell me his name as he has purple hair and should be easy to identify. I walk out of the store.

I attempt to file a complaint thru corporate office. Store number 06641 would not be accepted by the system. I had no recourse but to file complaint thru here.