Depending on your access level, you should be able to remove the campaigns by adding an end date to them like so:

1. Go into campaigns and search for the sites
2. Locate the campaign you want to terminate
3. Click on the dropdown on the left of the campaign
4. Click "Open"
5. You will be directed to the campaign details page where you can enter an end date as shown below.
6. Click Save on the bottom right of the page

If the Selected Dealer is "ROOT" or not included within your assigned dealerships, you will not be able to amend this.  

For best practice, all campaigns created within the P360 system should include an end date if known. If this is not concluded then the campaign will be indefinitely active.