No pay

I work for family dollar so I'm not sure if anyone can give me advice or insight

I've been working for 1 1/2 month now and have already had issues. I mixed up the first three digits of my SSN with my exes number. I quickly notified them of the mix up and let my manager know. I worked with no i-9 for three weeks until I finally emailed the DM for my area because I realized it would affect me getting paid.

Missed the deadline so on July 4th, everyone got paid except for me. They finally submitted my i-9 and said I'd get paid Friday 7/10. Waited all day and we'll into the night and no pay. Turns out no one told me to resubmit my w-4 so long story short I came to realize my entire first check, a WHOLE MONTH, of wages went to taxes and withholding.

What can I do? I'm a single mom who's been living off my parents and ex for a whole month and a half. Credit card is due, bills are due and I have nothing to pay any of it with. I'm just trying to get out of a bad situation and I worked my ass off the entire time and I feel like I have nothing to show for it.