How to fix this message from Google AdSense?

How can I fix this message from Google AdSense: Thank you for your interest in Google AdSense. While reviewing your application, we noticed that your account information matches a currently approved AdSense account associated with alexandersjefen@gmail.com.

Presumably, you’ve signed up for AdSense before.

Contact their support for clarification or account recovery.

Yeah I think I have write something common to this before, but how can you contact their contact their support for clarification or account recovery?