My First Cinqo

I had to catch a 7am train earlier today and decided to stop by the cafe at the station for a cup of coffee and a croissant. Later, I asked for the bill, took out a clean, crisp 10 euro bill I had acquire the other day from a vendor and paid one of the staff (we'll call her staff one). When I got the change back, it was 5 euro short. I told them the change is incorrect, and of course no one spoke a word of english and Staff One kept saying I gave her a 5 euro bill, and I kept saying no. Staff Two (She) who was handling the cash machine at the moment of course believe Staff One, but my question to her was how was she supposed to know when she was also taking another customer's money without paying attention. (I was standing at the cashier witnessing the situation at that moment) This went on back and forth, me speaking english and them speaking spanish. (Apart from everything else they said, I only understood the number 5)

The whole situation was so ridiculous and I stood at the cash machine till Staff Two came back and still kept telling me no, I gave them a 5 euro bill. Minutes passed and the only male staff walked in and seems to be asking what was going on. Staff Two and him were talking and somehow Staff Two took out a receipt from the customer before me, both of them looked at it and Staff Two took out a 5 euro bill and gave it to me without saying a word. And she didn't need to because clearly she wasn't paying attention and it was her fault, the other customer got more change than he needed, of course he didn't complain. I walked out saying "Gracias".