A competitor gives us real clicks taken from Google.com (with https://www.googleadservices.com/…) that Adwords charges us but are executed by a bot. Many urls in few hours,

For this last reason, WITHOUT REFERER appears on the server (clicks from real users, the referrer is google.com or google.es). Searchs are not performed in the search engine

Is there a way to block these clicks without a referrer so that they are not charged?
Thank you very much in advance

Now on the server what we do is that the links that do not have a referrer are sent to a 404 error page.

We think this doesn’t work because Adwords counts/charge all

Adwords removes some clicks but only a few