Redirect settings for Contact Form 7, Redirect after mail sent or form submit, Add settings line in form “Additional Settings” tab,
on_mailsent_redirect_to: REDIRECT_URL
on_submit_redirect_to: REDIRECT_URL
Example:
on_mailsent_redirect_to: https://www.example.com/thank-you/
on_submit_redirect_to: https://www.example.com/step-2/