I changed the email and name of admin and now I cant delete my project

I have updated my email address and user name on my new project, and now that I have played around a little I want to delete my project and start again. But it keeps telling me the user name (old user name) is not valid. Any advice?

Kia ora This is because you will be showing as an author of the project. Contact support@trap.nz and we will be able to change the other from the back end of the project.