There are a lot of this threads in the community, here an example:
For more info you have to contact support of github at email@example.com or direct with https://github.com/contact
Hope to help you
I am a professor at Maryville College and I have been using github in my Computer Science classes.
Today an organization that I created for a research project was flagged. That was irksome as I am about to present at a conference, and I want that material to be available to the people at my talk. I contacted support, but I have to say that now that I see github is in the habit of flagging students, I am deeply concerned.
I think I will begin the process to move over to gitlab. They don't seem to have the same problems. I simply cannot risk staying in the github system if accounts that do not violate usage policies can suddenly be disabled. I also cannot in good conscience encourage students to sign up for such unreliable services. Unfortunately, I have quite a few automated scripts for handling student repos so it will take me a while. This will be the last semester I use these services, and soon I will have relocated all my research code to more reliable services.
Also, so you feel the full brunt of my sting, I was a paying customer. I will not be renewing next year. Sadly, I have not choice but to renew for this year.