Site was hacked

Worry not! You can use this article to help you get your site back in working order: https://www.ads-software.com/support/article/faq-my-site-was-hacked/. Feel free to post more specific questions if that article does not help you.

Once you do get your site in working order there are many articles on the web that will help you to increase the security of your site I would suggest starting with this one: https://www.ads-software.com/support/article/hardening-wordpress/

Hope this helps you get going in the correct direction.