Telegram Account Hacked: Unable to Terminate Unauthorized iPhone Session

I am using Telegram on an Android Vivo phone. Around 10 days ago I noticed that my Telegram account had been hacked and has been actively used on an iPhone. Every day I can see that my account is being used from that iPhone device and they keep terminating my attempts to control my sessions. When I try to terminate other active sessions from my device, Telegram shows an error message saying that, for security reasons, I cannot end old sessions from a newly connected device. Because of this, I am unable to log out the hacker or stop the unauthorized access in any way. I request that my Telegram account be secured by logging out all devices that are currently signed in, including the iPhone, and that my account be permanently blocked so that it cannot be used by anyone in the future. I would like this to be done urgently to protect my personal data and prevent any misuse of my account.