Telegram Account Banned Without Warning And Access To Study Groups Lost

I have been using Telegram on my Android device and my account has just been banned without any prior warning or clear reason. I did not receive any explanation about what policy I allegedly violated or why this action was taken. I actively use Telegram to prepare for my exams, so this ban directly affects my studies and access to important educational materials and groups. I have no idea what could have triggered this ban and I believe there has been a mistake or an unjustified restriction on my account. I have not yet been able to reach Telegram support and there is still no detailed information provided to me. I kindly request the immediate reactivation of my Telegram account and a clear explanation of the reason for this ban, if any, so that I can avoid any similar issues in the future.