Why didn't you ask them right when it happened? Why back biting now? If you cannot communicate and clear things out, it's not their fault (maybe they might have made a mistake, for all I know). What proof do you have for us to believe that you're not making this up. If you have the receipt (not what you think should be) and other written record, you still have time to confront them, or else stop you typical Nepali attitude. Change yourself bro. Man up, this is not Nepal.