Cannot delete organisation from Teams

Hello,

I tried hundreds of times to delete (Leave) the organization I used to work for 5 years ago. It appears to be impossible to delete an organization from my account

When I try to Leave (delete), then I receive the next message

When I try to change organization in order to delete Spirit from my account

Then I receive the next message

I tried everything and numerous times and also tried contacting you before and received no answer. I need someone to help me deleting Spirit from my account PLEASE.

THANK YOU