I paid for the bar alone, and was supposed to be given $17.95 in change. The cashier gave me a 10$ bill, a 1$ coin and 3 quarters. I waited for the rest of the change but she began preparing for the next person, so I said "Excuse me, you've given me incorrect change. I still need 5$ and another 1.20$."
She looked at my hand and my receipt and acknowledged that the change was off by a fair amount but began serving the next customer. The other customer started to say something along the lines of "I think the other person needs to get their change..." and the cashier said "No no, it's okay".
At this point, I was annoyed. I mean, everyone makes mistakes and that's not the problem. But seeing that there's a problem and then starting on serving another customer was rude. I was frustrated that my trip was taking much longer than it should have and I did ask for a voucher since this was ridiculous. She finally gave me my change after she finished serving the other person and then slammed a voucher on the counter and moved on to the next customer.
I did still get my drink and my little bar, and when I got to work and I opened the bag, the bar was smushed. I think this was a final passive aggressive gesture to finish off my experience. Still ate the bar because I paid for the bloody thing and it was still edible.
So what should have been a 5 min stop before work turned into 10 minutes and incredibly rude service.