@[deleted] welcome to the Atlassian community
Are any of the products still being used on the account? That is the issue. You will need to cancel the products and then you will be able to delete your account. If the products still need to be used, you will need to add an additional billing contact and then you will be able to delete the account.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.