How do you file a complaint against goodwill industries?

How to file a complaint against goodwill? I wentto the cashier, who excused herself for a moment, when she came back with a pair of shoesthat i selected they had tripled in price because this moron believes that anything with "Italy" stamped on the shoe, must be worth a lot of money..... also, hardly anyone speaks english.so it makes it difficult to understand.