Telegram Recovery Issue After Losing Access to Old Gmail Account

I had a Telegram account registered with my Ethiopian phone number starting with +251 and linked to my first Gmail address. Around three months ago, I lost access to that Gmail account. After that, I have not been able to log in to my Telegram account on another device, because the login process keeps sending information to the old Gmail, which I can no longer access. I would like Telegram support and Google account services to help me recover access to my Telegram account by allowing the login code or verification to be sent to another Gmail address that I currently use. I have tried to reach both Telegram support and Google support about this issue, but I have not received any response from either side. I am requesting your help so that I can use my Telegram account again with my Ethiopian phone number and a new, active Gmail address, since the old Gmail account is no longer accessible to me.