i am happy to have a reasonable talk about the issue without being loud and talking down to the locals.If I don't get what I need that way, I just take my business elsewhere without fuss.
guy next me from the UK had a 12 month student visa. They checked his passport, saw the 90 day stamp and refused to unlock his account. Said it must be 12 months, he said it is but they stamp every 90 days. They said no and closed his account. I am sure they make this up as they go along.....