Telegram SMS Code Not Received

I would like to log in to my Telegram account on my Google Pixel 6a, but I am unable to do so because I am not receiving the SMS verification code. I am trying to log in with my Tanzanian phone number +255 621514***. The phone works normally and I can receive SMS messages from other services and numbers without any problem, but Telegram’s login SMS never arrives. I have repeated the login attempt many times and waited, but the code still does not come. I tried to get support but the issue has not been solved and I still cannot access my account. I kindly request your assistance to fix the SMS verification problem and help me quickly regain access to and log in to my Telegram account linked to this phone number, and to provide any additional support needed so that I can successfully log in again.