Netflix account hacked (pw and email changed)?

Can it be helped? Unfortunately, I have not made the security check with mobile phone number

Please contact Netflix Support. There you can help you the most.

To contact Netflix support who also have a LIVE chat.

As the others say, contact support, preferably choose a really strong password (special characters, numbers, upper and lower case) and if possible 2FA (2-factor authentication) e.g. With Google Authenticator or similar