Telegram Account Hacked and Unable to Terminate Unauthorized Sessions

I use Telegram on a POCO X6 Android phone. On 16 October 2026 I noticed that my Telegram account had been hacked and was being actively used on an iPhone without my permission. Since then, every day I see that my account is still being used from that iPhone device and the other party keeps terminating my attempts to control my sessions. When I try to terminate the other active sessions from my own device, Telegram shows an error message saying that, for security reasons, I cannot end old sessions from a newly connected device. Because of this restriction, I am unable to log out the hacker or stop the unauthorized access to my account in any way, and I am worried about the safety of my personal data and any possible misuse of my account. I request that my Telegram account be urgently secured by logging out all devices that are currently signed in, including the iPhone, and that my account then be permanently blocked so that it cannot be used by anyone in the future. I kindly ask you to treat this as an urgent security matter and help protect my personal information.