If you fail all your verification attempts during the creation of your professional voice clone, you can wait 24 hours, after which time you will be able to retry the process.
You can also reach out to support so they can look into it for you. If everything looks correct, they will remove the failed verification attempts so you can retry the process from the start.
When doing the verification, please be mindful of your setup. Make sure that your web browser is allowed to use your microphone and that you are not muted. Also, ensure that the recorded audio from your computer microphone sounds similar to the audio uploaded for cloning, without any background noise or other external audio interference.