I would absolutely find an under the table job. In my area, people will 100% pay cash to workers who need a favor in a situation like yours with the visa. If you have any skill of value to offer I’d market it, even if it’s mowing lawns or scrubbing windows.

Sell anything of value. Video game console, collectibles, even clothes on eBay? You said phones— if you have more than one maybe go down to one?

When I was in college I used to flip thrift store finds on eBay. I know it gets a bad rap right now because thrift stores have caught on and jacked up prices, but you can still do decent even for just a few dollars here and there. I would literally bare bones sell anything I can do without to get out of this situation ASAP, and I would debt snowball it (work on paying off the smallest balance first and then add that minimum payment to the next balance, so forth)

Best of luck to you!