You can change your project's owner or move a project to a free account by contacting support.
How to change your project owner or account type
If you need to change your project's owner or move a project to a free account, contact our support team. Provide the project name and the new owner's email address. A support agent will make this change for you. This process is necessary if the current owner's email address is no longer active or you need to change account types.