How do I get a good lawyer to deal with local social security office?

Boy, you wouldn’t believe what’s going on in that office! I just want to get a good lawyer to deal with it.

I have almost no money. The office itself is supposed to provide info on how to get a lawyer from their own office and not have to pay, but they are not!

I only have S.S.I., not S.S.D., so this is very important to me. Thank you.