Telegram Account Recovery After Losing Samsung Galaxy M12

I lost my Samsung Galaxy M12 phone in Addis Ababa last week and since then I have not been able to log in to my Telegram account, which is linked to the phone number +251 92 762 90**. When I try to access my account, the system says that a login message or code has been sent to “another Telegram device”, but I no longer have access to my old phone. I have tried the recovery steps suggested by Telegram, but I am stuck at the stage where the confirmation is sent to the device that was lost. Because of this, I cannot reach my messages and contacts and I am very worried that my account may be used by someone else. I request that my account linked to +251 92 762 90** be secured and that I be given an alternative way to regain access without needing the old device, or that my account be deleted permanently if access cannot be restored safely. I kindly ask for support so that this issue can be resolved as soon as possible.