How can I change my number without the code I don’t have that number no more

You can update your trusted phone number through account recovery. Go to appleid.apple.com > Sign in with your Apple ID > Select “Didn’t get a verification code?”, then select More Options > You'll be redirected to iforgot.apple.com > Complete your account recovery request. Learn more about account recovery.

See if anything here helps.  If necessary, you can use account recovery as explained in the link at bottom of the article.

Verification code - how to get one and sign in with two-factor authentication.   *