When I try to delete my Ad Accounts, it is saying its ineligible for deletion.

Buyer Message: 

Hello, I have a Facebook Business Manager and its pretty simple what I'm trying to achieve. I simple want to delete all my Ad Accounts so I can start fresh as if its a brand new Business Manager. For some reason when I try to delete my Ad Accounts, it is saying its ineligible for deletion. If you confidently feel you can delete my ad accounts and restore my business manager so its like its brand new. I would like to hire you for this task. Look forward to hearing from you! 

Thank you. 

After This Buyer Agree to Order me.

Then, by working with him he was satisfied with me and gave me good reviews including 5 stars. Which you can see in my profile.