My workplace is doing illegal things and I don’t know what to do?

if something expires they change the date and put it back on the shelf. i worked over time and they paid me under the table ( not taxed) and didn’t pay me over time either. they are so unsanitary it’s disgusting. they buy things from surrounding stores and sell them at our place for WAY more (something was $3.99 they have me sell it for $12.99). i try to throw anything expires away they get mad at me. the managers wife uses the spray deodorant we have and then puts it back on the shelf. someone bought a burrito from our freezer section yesterday and came back today to complain it was moldy and they got sick and all my managers said was “ just ignore her till she leaves”. also if something expires they scrub off the date so it’s hard to read and place it back. the problem is i can't report them. no places are hiring near my home and the managers are scammers and will make me regret saying anything.
My workplace is doing illegal things and I don’t know what to do?
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