How I stop the capmaign?

Hello @Ana Calughin,

Welcome to the Klaviyo Community!

Campaigns can only be cancelled if they’ve been scheduled to be sent at a future date and time or they can be cancelled mid-send if you were using a sending strategy such as batched, A/B testing, or at a recipient’s timezone. If you were using the “Send now” option after creating your campaign, this sort of campaign cannot be cancelled as the campaign would be sent then and there.

You can cancel a scheduled campaign by clicking the Actions icon and selecting the Cancel Send option as highlighted in the How to Cancel a Scheduled/Sending Campaign Help Center article.

I hope this helps!

David