Friends took over my GitHub repository after I gave them ownership rights

I need help with a GitHub issue that went wrong. I initiated a coding project and set up an organization for it. Trusting my friends, I made them owners of the organization, even though I was the one doing all the coding. For several months, everything was good as I continued to add features and fix issues. However, after some personal disagreements, they removed me from my own repository. I can’t access my code anymore. This situation surprised me since I thought we were working as a team. Has anyone experienced something similar? What can I do to recover my work or prove that I wrote most of the code? I have contacted GitHub support but I’m uncertain about my other options.