Employee cashier a little lazy, who wanted to pass...

Employee cashier a little lazy, who wanted to pass it smoothly by applying 10 euros more on the price of the book, 30 instead of 20 euros, which if I didn't tell him how much the price was, he would have made me pay more. Moreover, he is also uninterested in the work and requests of his friends as regards the search for a book. The person goes to the department that takes care of this research, not answering "I only deal with the payment".
Not to mention the worldwide propaganda present at Father's Day two months ago.
To avoid just.