Unfreeze My Telegram Account

I am writing regarding a serious security issue with my Telegram account, which has been hacked and is currently frozen on my Android device (OnePlus Nord CE 3 Lite 5G). In the Devices section of the Telegram settings, I noticed an unfamiliar active session titled Samsung Galaxy A51, with a location shown as Kovel, Ukraine, dated September 22. I do not own or use a Samsung Galaxy A51, have never been in Ukraine, and do not recognize this session in any way, so I strongly suspect unauthorized access to my account. Since then, my Telegram account has been frozen and I am not able to use it normally. I have tried several times to terminate this suspicious Samsung Galaxy A51 session from the Devices menu on my own, but the session remains active and I cannot remove it. This situation makes me very concerned about the security and privacy of my data and communications on Telegram, especially because I need my account for my future business activities and communication. I kindly request that you urgently review my account, unfreeze it, remove all unauthorized or suspicious sessions, including the Samsung Galaxy A51 device from Kovel, Ukraine, and help secure my account against any further unauthorized access. I am ready to provide any additional information you may need to verify my identity and restore full, secure access to my account. I ask for your prompt assistance with this matter and look forward to your help in resolving it as soon as possible, as I need to use Telegram actively for my upcoming business purposes.