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We have problems with spam on a particular article, which shows 23473 visits.
We know that this number of visits is not real and that is the result of spam.
Everyday, we delete an average of 60 spam comments.

The problem: We are receiving spam in a particular article of our website.
We configured the comments with the following options:

• I have enabled comment moderation For all.
• The automatic option to publish comments NO.
• Comment moderation: YES.

Could you please help us find a solution
Thank you in advance for your support

You need to either enable Recaptcha or Akismet.
Both these services are enabled from K2's settings.

Dear friend, I have enabled recaptcha. But apparently, the spam is done manually.

This is not good.
You need to disable the auto publishing of the comments.
This setting is located in K2's params.

Furthermore you can also enable comments only for registered users.