Repairing or improving your credit is an ongoing process and not a quick fix. It takes time (months), some know-how, and a simple budget. . . but where to start?
Steps include:
If this seems like too much, you can hire someone to be your advocate but make sure you review the Credit Repair Organization Act.
If things go south, you can contact the State Attorney General or the Federal Trade Commission.
Read a full article by the Federal Trade Commission:
https://www.consumer.ftc.gov/articles/0058-credit-repair-how-help-yourself