Your post is difficult to understand but I'm assuming that you don't have access to the email account to which 48 are sending the multi factor authentication code to?
If that's the issue then see here:
What happens if I don’t have access to my registered email? : You’ll need access to your registered email to reset your password and complete verification when signing in. If you can’t access it, contact our Care team and we’ll help you get back into your account.
If you need to contact 48 support about this then see the links in my signature below.
