Theres was a cashier named vanessa i believe, and ...

Theres was a cashier named vanessa i believe, and she had an attitude the whole transaction.
I'd ask a simple question and she'd just ignore it and when she handed my change she was so aggressive about it.
Why put a a woman upfront as cashier with such a very rude and aggressive attitude upfront? I understand if someone has bad days but one should leave that at the door specially while working at the register. Didn't even give me the correct change back. Just left it at that and took my purchase. Unbelievable really