wow let us know how it goes, id contact the natl labor, bbb, osha and call them (the lfs) and tell them you have an appointment with a lawyer. sorry, but i wouldnt take them jerking me around. you should have been told what your hourly wage was BEFORE you even started working- you signed paperwork, right? hope you got a copy of it all, if not go in there and request a copy. if they refuse tell them the lawyer will get it from them then.
forget the store credit thing. if they werent willing to pay you, what makes you think they will give you a fair shake on that too?
forget the store credit thing. if they werent willing to pay you, what makes you think they will give you a fair shake on that too?