Delete an admin account

[Martins]

I created an account and a team with my university email address. I couldn't delete the team and my account. It shows that my account is managed. How do I delete the admin account and all the stuff? 

[Nic Brough -Adaptavist-]

Managed accounts are owned by an admin (or set of admins).  You can't delete the accounts, you need to ask the domain admins to do it.