Automatic spamming usually generates more requests than a human. The easiest way is to go to «Most active users» and look at the click paths.
In most cases, you can prevent such spam entries if you protect your comment fields with a capcha code. If you use a CMS such as Wordpress, there are various plugins that you can set up directly in the CMS. Here you can find more information on how to protect your website.
For support requests please use this form instead.