How he can get be punished? How they informed him about something as that? Did he received a letter or some electronic mail? Mind attaching a picture of it?
Answer: You can always use a VPN as a solution.

I want to ensure you that every ban is always followed by a proper reason. If you wake up in a situation where your account is banned, feel free to make a proper post under Unban Request.
Do not forget to bring the necessary evidence to appeal GMs decision.