Our records indicate that you are not the owner of team "x". For security purposes, this account can only be closed by the owner. I want to delete my account and reopen as freelancer. I used my school email and accidentally joined team
Please note that you can be both a freelancer and a client on Upwork. You'll use the same account to log in to Upwork, but the two parts of your account will be kept entirely separate. You'll be able to easily switch between the two as needed. You can read more about it here.
I checked this for you, and you have an open ticket regarding this. I'll follow up with the team and they'll update your ticket as soon as possible and one of our agents will assist you further regarding your account.