can an employer hold entire check

i work at a hotel sad thing is i became homeless durin that time so i asked if i could stay in a room till i could save enough to get an apartment, but it's been almost 3 months and i haven't gotten paid at all and if i ask for money i have to pay it back i get nothing and on top of that he is chargeing me by the day and at full price, i had to get a second job just to have some way to feed my kids and he asks for money from that pay check as well. im not in the system and there is nothing that states i owe him or have a room here is this legal? can he keep doing this to me?