BenchmarkONE gives you 3 ways to stop a campaign:
Campaign Detail View
This will stop the campaign for ALL contacts.
Head to: Emails > Campaigns
Click on the campaign you'd like to stop to open up the detail view
Click on Actions and select Stop the Campaign
Contact List View
This is a great way to stop the campaign for specific contacts.
Filter and then select the contacts that should be stopped on the campaign.
Click on Actions and select Stop Campaigns
Select whether you want to stop all campaigns for the contact(s) or one specific campaign
This will stop the campaign for an individual contact.
Navigate to the Contact Record
Select the Campaigns Tab
A grey stop button will appear to the right of any campaign currently in progress. Click that button to stop the specific campaign.