Telegram Phone Number Banned Without Explanation, Unable to Access Account

I have been using the standard Telegram application and my phone number was banned approximately 6 months ago. Since then, whenever I try to log in, I receive the message “Your phone number is banned” and I cannot access my account. I contacted Telegram support but have not received any response so far, and my number remains blocked without any explanation. I do not know the reason for this ban and I believe it was applied unfairly. I kindly request that my phone number be unbanned and my access to Telegram be restored. If possible, I would also like to be informed about the reason for the ban so that I can avoid any similar situation in the future.