Can't log into Admin

Hi,
I have been trying for weeks to recover my log in information, but none of my emails or passwords are working.I need to update pictures and information on the website to stay current with our organization. There is only a lost password function, but it seems that none of my emails are under the admin page. I have tried all of my emails and there is no possible way of retrieving the website admin page. Is there a way to reset through security or any other way?
Thanks,
Jessy