Thanks for reaching out to us.
Can you please give us a temporary admin access to your site in a private reply? We’ll be in a better place to spot anything suspicious from here.
You can add new users by going to Users > Add New set the user and password for us, set the role to admin and set the info here. You can navigate here for more details; https://make.wordpress.org/support/user-manual/customizing-wordpress/managing-users-on-your-wordpress-site/adding-users-to-your-wordpress-site/.
Hope to hear from you soon!