Family Dollar

I went inside store to get 1 movie theater candy box and try pay for it a young girl and a guy was playing and talking..and i had to be somewhere in a hurry. When they rung me up 5 minutes later after talking i use my debit card to get cash back (only 10$) the guy say he doesn't give cash back and he said "don't give him my 5's give him that 10 buck... he told the girl. Then the guy was like if you can see and put glasses on you can see this sign say we don't give cash back... but I didn't see a sign that say that...so I running late after my purchase I opened the door accidentally hard.. after his comment. He came outside after me talking about something (I didn't hear what he was saying ) but he was unprofessional to follow a customer outside on there job about a door being open hard.. to fight a customer. I will not come that family Dollar anymore.! I was in a rush and i was lateee