i find that most of store staff do something like that and be rude. i always have this problem whenever i go into carrefour to get me n my mate a cola or something like that. i always seem to run into the fact i dont have one riyal but a 100 note and instead of the staff guiding me to a place that has change all they do is just take the drink off the counter and refuse my money. i also get the problem with shop assistants following me about. Im a teen and maybe they think im going to nick somethings so find it neccesary to be my shadow wherever i go.