since you quit you get paid on your regular pay day.
If you were still working for the company, when would you be paid for the hours in question? That is when you should be paid. SOME states require payment sooner if THEY fire you. If you quit, you are NEVER entitled to be paid before your regular pay day.
Why did you expect to be paid in 72 hrs? That is if an employer fires you. If you quit.. you are paid (by law) on the next, REGULAR pay day. Because you made the choice to leave, the employer has no obligation to stop his bookkeeper from their regular schedule in order to do the paperwork required for issuing a check.
Call a unemployment lawyer for advice.