Good afternoon Leeann and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
We are sorry to hear about that massive amount of spam. Yikes!
I would love to help you with this topic.
I went ahead and visited your Community Add event link which is protected by a login screen (great!).
If you are being spammed, I am assuming that somehow, the spammers have figured out a way to create a WordPress user account on your site and circumvent the Captcha you have in place.
To address that, there are a couple of things I would recommend:
- Install a plugin such as Theme my login: https://wordpress.org/plugins/theme-my-login/ . That will provide you with more control over the login and account creation process (adding a hurdle), provided you configure it accordingly
- Install a security plugin (iThemes security and Wordfence are popular choices). This will let you control users from official blacklists as well as prevent spammers from using scripts to try to create users.
Let me know if that helps.
Have a great day!
Geoff B.