Can I move my family account to my existing Deezer Free account?

I have an old Deezer free account with no playlists or other personal content. I have been a member of a family account for years and have a lot of playlists and other data in it. 

I want to move this family member data to my personal account. In family settings there's only an option to create a new account to do so. But if I want to use my e-mail connected to my old personal free account, it cannot be done, because "e-mail is already in use". Is there any ways to do this? If no, how can I delete my old personal account in order to move family member data to a new personal account using my preferred e-mail address?