when i try to sign in to my account, it asks me for a 6 digit 2 factor authentication code sent to a really old phone number of mine. is there any way i can recover this account/turn 2fa off? (i have used a different account to send this btw)
See the following from Two-factor authentication for Apple ID - Apple Support
If you can’t sign in, access a trusted device, reset your password, or receive verification codes, you can request account recovery to regain access to your account. Account recovery is an automatic process designed to get you back in to your account as quickly as possible while denying access to anyone who might be pretending to be you. It might take a few days—or longer—depending on what specific account information you can provide to verify your identity.
See the following from Two-factor authentication for Apple ID - Apple Support
If you can’t sign in, access a trusted device, reset your password, or receive verification codes, you can request account recovery to regain access to your account. Account recovery is an automatic process designed to get you back in to your account as quickly as possible while denying access to anyone who might be pretending to be you. It might take a few days—or longer—depending on what specific account information you can provide to verify your identity.
See if anything here helps.
Verification code - how to get one and sign in with two-factor authentication
2 factor authentication
