If you are paid off the books, what can you do when you are given a week off without your consent, with no pay and only your days worked are being cut back.

I work for a company where I am the only female and been given hard labor duties while the men sit and do nothing; was given a week off after I said I do not want to take a week off and have it in email; came back to work and the locks were changed; came back Tuesday and my pay was under my keyboard, but didn’t receive a pay for that current week; now been told my days will be cut down to possibly two days a week and no one elses.