Pals i lost access to my gmail since then i dont know how to login into my binance account without the gmail but i have my registration number so i don't know is there anyway possible that i can login. And secondly my gmail i also have the registration number but when they send the otp to my line then they will also send it to my gmail which i can't access so i dont know if anyone has seen this kind of situation before if so you can share an idea to use.
OP If you still have the number associated to the Binance account try log in with " Phone number" instead of "email" and the OTP would be sent to your phone number.

I have used binance for a long time and you can't login with just your phone number, the reason why is because you have already verified your account and your email has also been verified, your phone number has been verified too, so even if you try to login with your phone number you still need to have access to your email account because you will also be asked to verify your email address, which means OTP will be sent to your email. You will need to have access to your email address because even though you want to make withdrawals you will be asked to provide the OTP from your email.